The question that needs answering is why tiny bits of matter clump together and evolve towards intelligence in the first place?
Study some electronics, in particular the theoretical aspect. Think about the amazing complexity that can be created out of nothing more than "on" and "off", including things like predictive modeling algorithms.
Now go back and think about
molecules atoms elementary particles. A random pile of electrons, neutrons, and protons is going to be awesome in an extremely hot (immediately after big bang) environment. But as soon as the universe cools just a tiny bit, they're unstable. Some of those particles clump together (opposite charges and all that). Turns out that some particular clumps are more stable than other clumps (go read up on chemical valence theory and orbital molecular theory). Then some of those clumps clump together and are even more stable. So... the unstable bits and pieces are just that - unstable. The stable clumps are just that - stable. Given time, the stable clumps stick around because they're *ta-da* stable. The unstable bits and pieces don't stick around because... survey says: unstable. Turns out there's a handful of clump designs (hydrogen and helium) that are fairly stable, to slightly differing degrees, at least within the environment of more or less evenly spread early universe.
Now move forward a bit in time, and gravity starts to play a role. Some of those clumps clump together even more. You get big clumps of little clumps, and you get increasing pressure due to gravity. Now those original clumps aren't stable - not under those conditions. So something changes, some clumps smoosh together in a different way, and are relatively stable within the new conditions. So we get some heavier atoms. Some combinations are more stable than others for a while... then the pressure gets too big and a cascade occurs - a pile of hydrogen and helium get squished by gravity so much that they squish into each other and you get fusion, which ends up spitting out all sorts of different clumps of particles, all just blobbed up by conditions. Now there's solid matter floating around (which ends up being quite a bit more stable under these new conditions), and gravity pulls that solid stuff together, and it rolls around since it's all spinning madly away in that chaos, and you get planets.
Now on one of those planets, there's a lot going on. It gets smashed by other bits of solid matter screaming by and incredible speed, it's got a molten core that's moving around and causing a lot of friction which keeps it hot, it's a great big hot mess of a young planet. So again, those atoms (now we have a name for the clumps of particles) are smooshed about, squashed up against one another, and basically shook up all over the place. Some of them that were slightly less stable stick to other atoms, and it turns out that the combinations of atoms are more stable in that environment than the atoms by themselves were - blammo! We've got molecules!
Fast forward a good long while (in galactic terms, just the blink of an eye). All those molecules floating around? Turns out that a group of them can *move*! When a photon hits the molecule, the charge creates a change in the structure, and it *responds* to the environment! Woohoo! That's some crazy stuff right there - a molecule that is in essence, a little machine! Right now it doesn't really do anything, but it responds to photons. And it turns out that in that environment, that molecule is more stable than other molecules are... so it sticks around better than other molecules do.
And then the world changes again, and that molecule ends up getting squished up with some other molecules that also respond to parts of their environment like little machines... and they clump together, and you get something that resembles an organism. Organic Chemistry has arrived! Now you've got great big clumps of particles all hanging on to one another like a huge otter flotilla, and several of them are reacting to things that go on in their environment, flipping back and forth like switches and so on. Turns out that some of these macro-clumps, these "cells" are pretty good at moving some smaller clumps from one place to another, by a series of switches and flips and transfers of it's own parts. Say hello to our little friend, the cell.
Of course, the environment continues to change over time (entropy, anyone?), so with each passing epoch there's a different combination of clumps that are most stable in that environment. Over time, those cells clump together and become even more stable within their environment. Then some of those cells use the particles and molecules that are being moved from one side of the macro-clump to the other, and instead of just moving it, those smaller clumps get put together into a clump that looks like the clump that it was passing through. We have now reached the stage of mitosis.
At this point, there's a whole lot of different cells floating around. Many of them are pretty similar, but in truth there are many, many combinations of molecules that are relatively stable in that environment. And because there are so many possible semi-stable combinations, things keep clumping in new and different ways. Eventually, we end up with a really big clump of cells, that are particularly stable in comparison to some of the others in their environment, and you start to get the first multi-cellular critters and plants.
Some of those critters have a new and exciting clump of cells that are still doing that old "react to photons" thing. And some other clumps of cells have gained a degree of stability and success in their environment by taking really big clumps of other cells into their structure, stripping away some parts of those clumps, forming certain bits into energy, and dumping all the leftovers back out into the environment. You might be familiar with this concept as "eating". Turns out that those critters with photon-sensitive clumps are better able to 1) find the clumps of stuff to "eat" and also 2) get away from the clumps of stuff that want to "eat" it. Boom - rudimentary eyeballs.
Now it turns out that those critter-clumps that have eyeball clumps as well as this weird squashy grey blob are even better at finding food and evading eaters. That weird grey blob is super efficient and taking the photon reactors, and passing it through a pile of electrical conductors and then reacting to those photons in a predictable, but relatively complex way. It's a simple circuit, really: If the normal pattern of light and dark is interrupted by a darkness in the way of the source of brightness, move sideways 5 inches. There's not really any real though going on in that "brain (the grey blob) yet... just a set of simple reactions to environmental stimuli. But those reactions give that big clump of cells a statistically better chance to continue being a big clump of cells... and incidentally, it that chance gives it a better chance to capture some other cells and rearrange them into a new pile of cells that resembles itself.
Now you've got... Very large clumps of cells made of moderately large clumps of molecules made of smaller clumps of atoms created from the agglomeration of particles. You also have brains.
End of Story.
{Granted there's a bit more in there, and I'm glossing over billions of years of time it took to go from elementary particles to rudimentary brains, but that's more or less how I understand it to work. Evolution is just a fancy word we use to say this is a more stable blob in this environment, but the concept is essentially the same whether we're talking about molecules that react when a photon hits them or we're talking about humans. Same principle, just repeat a few gadzillion times.}
Of course, that perfectly explains why we collapse every time we stand on deck, those hips just can't hack it. Or why we just plain go to pieces any time we need to wrestle, given our delicate shoulders?
