Does everyone who buys a domestic truck use it like this?
No, not everyone ... probably only 5 - 10%. But those of us who do use it to tow heavy or carry 2000+ lbs in the bed need the biggest truck they can get. And overkill in buying a truck when doing these activities is a must so you can STOP THE LOAD not just get it up to speed. That is where most people who tow fall short when buying a truck.
The new trucks with 19.5" wheels offer larger diameter brakes, and new advances in power braking in the auto-tranny's helps (but real towers drive manual trannys ;-))
But some like below is what I droooooolllll over