Roger Ramjets
Philosopher
You are assuming God can do anything. This is not correct.Could I or you do a better design if either of us was God? Quite obviously yes.
Again, you assume God could just 'design' a fish and have it turn out 'perfect'. But such a God wouldn't even create that fish in the first place. I mean, if He could do anything then He could design fish with no nerves at all, and that don't need to eat other fish, or live in water, or any of the other things about fish that aren't as 'good' as you imagine they could be. A 'perfect' fish would be an incredible fantasy very different to a real fish - so fantastic that we might not even recognize it as a fish.Because nature doesn't roll back and re-evolve something from scratch. It just piles up hacks on top of old hacks. If that nerve went that way in fish, that's the way it will always go. But if you were to actually be God and design it, you could achieve the same function with a lot less nerve.
You say that if you were God you could just wave your magic wand and do anything you imagine, but how do you know that? We know the real world doesn't work that way. If God exists then He is constrained by reality. If He created the Universe then He made it in a way that uses evolution - not magic - to produce fish and humans. And having done that it might not be possible for Him to change the course of evolution without breaking it in ways we can't even imagine.
The things you think are so important that He should meddle with evolution may not be. Are humans the end goal? That's highly unlikely. More likely we are just another small step along the way, no more important than fish or microbes. Just look at what has evolved so far, and consider the amount 'discomfort' that has caused to the creatures it produced. Clearly avoiding discomfort was not part of the plan. And why should it be? You can't make an omelette without breaking eggs.