Sorry to veer off-topic a little here, but why do we need to have a reason for driving a truck? Luckily for me we still live in a free (for now at least) country. Where we're free to choose what we want to drive. There are no rules that say you can't have a truck unless you want or need to do "truck things". My lady and I both drive trucks. We each have our own Ram 1500 Limited. Neither of us tows anything. And we almost never need to haul anything. I don't go off-road anymore, although I like to have the capability to do so. My reasons for driving what I drive are my own. I can afford to drive pretty much what I want, and what I want to drive at this point in my life is a truck.
Playing devil's advocate here but, there is something to be said for the excesses of western culture. There's people out there that would be happy for a decent pair of shoes, never mind anything with a motor, never mind a $70K truck that is being used for things that pretty much anything with a motor could do, and spend less resources (i.e. gas) while doing it.
Could maybe think of it like ordering a 40 oz porterhouse steak that you know you're gonna eat less than half of, but because of the cut of the meat, it tastes better. Rest goes in the garbage. That's wasteful, and the idea of taking something perfectly useable (i.e. the bed and/or towing capability of the truck) and rendering it useless is counterintuitive; it's more of an emotional standpoint to purposefully render something useless that has a use.
Could you get around in a Toyota Celica and take the $40-$50k you didn't spend on the truck, and buy a couple of cars for people who otherwise wouldn't be able to get a vehicle at all? Probably. Would that be an objectively better and more morally "correct" thing to do? Obviously I don't believe that, or that's what I would have done.
So don't get me wrong, I pretty much agree with you, this is our life, our time, our hard work, our money, our resources, our choice to do with these things what we will. But I can see the other side of the argument too.