IMO there are very few people who actually need a pickup truck for towing or very large/bulky items, but they're still very popular since there aren't great alternatives in the US due to the chicken tax.
However, the fact that it can be done doesn't mean it's the vehicle for the job. We have a pickup truck, but I'm not a big fan of them.
The RAM is so tall it's unwieldy to get stuff in and out of the bed. I really need to sell that thing and get something practical.
I'd argue you can do most of those things with an SUV or really any car with a roof-rack. I rarely need a back seat but I do appreciate having interior space to keep/transport camping gear etc. in my car. An open bed will tend to work better for some large awkward items but this isn't even that big a bed and you can always rent a truck or trailer for a day.
But really, I'm making a largely rationalist argument and a lot of people in the US just want a pickup.