Something like 10-15% of US households own a boat or camper. Over 60% of cars sold today are SUVs, and a ton of those would not be great to tow a boat or decent sized camper.

The vast majority of people I know who daily drive SUVs and trucks do not own either a boat or camper.

You can tow a boat, caravan, etc. with a smaller Holden Rodeo crew cab at 1.5 tonne (and / or many other vehicles that are not massive over sized yank tanks).