Pickup trucks are as much status symbols and cultural identity as they are practical working vehicles by my estimation.
Not to digress too far, but why is that? An F150 can cost upwards of $40,000. If you've got 40 grand to spend on a vehicle, why is a truck -- big, hard to park, gas guzzling, not very comfortable -- preferable to and more prestigious than one of the many other vehicles in that price range?
They're not prestigious, and the phrase "status symbol" is misleading at best. "Cultural identity" fits for some, though, but only as a badge of a subculture that's actually the opposite of prestige-based; instead it's a type of people who perceive themselves as being looked down on by others and have embraced that as a good thing. If there's a "status" that they're a symbol of, it's "not one of those elitists and not listening to them either".
Ignoring that and focusing on practical matters, though, there are reasons to get a truck that have nothing to do with image/identity, but it's also true that most trucks never get used for the biggest "practical" abilities they were designed for. Their beds stay empty all the time and they never go off-road. However, some people figure it's best to have the options even if they're rarely used, rather than be stuck without them if & when the rare occasion happens when you would use them.
And even aside from things like hauling your own lumber once in 15 years (when it would be cheaper to drive a car that whole time and either rent a truck or a flatbed trailer or even have it delivered for this occasion), there are still other practical considerations. I, for example, find it a much better driving experience. Yes, bumps & dips in the road make its suspension sway slightly more, but I don't care, and the visibility is far better, both because of the height and because of the reduced number of "pillars" (vertical metal parts between windows) obstructing the view. Cars make me feel like my butt's on the pavement and I can't see everything I should see, and the low roof makes all the bending & ducking & maneuvering to get in & out, and take anything else out or put it in, an annoyance that I am free from with my truck. An SUV of the same height would solve the height thing, but still have more pillars in my rear view and cost several thousand dollars more for extra seats I have no use for. And, about those back seats... one thing I did like about my last car was that its rear seats were removable, which not only meant I could take more stuff from place to place but also made the back area usable for sleeping in. But no cars or SUVs are made with removable seats anymore, so the only choices that would serve the same purposes are to either buy a car/SUV/van and spend a bunch of money on seats only to amputate them to make room anyway, or get a truck for much less money than an equivalent SUV/van and come up with some way to (at least sometimes) enclose the bed. (I did get a light truck, not a full-size one, so the width & length aren't so atrocious for maneuvering in limited space, the fuel efficiency is better, and it was over $10000 cheaper, without much sacrifice in height... but a full-size pickup truck would have gotten me slightly more height and slightly more bed space.)