Why have a guest room when there are hotels you can send visitors to?
Why have a 4 door car that incurs most of its mileage in a commute with 1 or 2 people?
People should just do the math and decide for their own particular case if hauling around a huge vehicle with all the disadvantages that come with it (maneuverability, fuel consumption, parking, etc.) actually pays off when they need the capacity, or if they're better off always using the right tool for the job (regular car for most of the needs, rent big one for the rest). YMMV.
I’ve seen several comments in this thread that conclude that it’s wasteful to have the truck bed when you are not using it. Going one level deeper, to the owner it doesn’t feel wasteful on a day to day basis because you forget it’s back there when you’re not using it. But it’s so handy when you do need it.
Former truck owner myself, I downsized to a car after moving to a more urban setting. It’s often on the weekends that I loathe not having to pickup for various furniture moves, gardening, etc. since I now have to borrow and friend’s or rent one.
How many times per year would you say you need to move furniture? If you do it 1 day per month but carry around a full truck and the above mentioned disadvantages the other 30 maybe it’s not that bad of a trade off.