I think a lot of it has to do with regulating stupidity.
People have no common sense anymore and don't adjust speed and account for stopping distances so they have to make sure they account for most of the variables when your towing something.
And with no personal responsibility acceptance and everybody wanting to sue somebody they have to cover their own butts.
Somebody towing a 10,000 lb. something with their Jeep Wrangler and gets into an accident they would blame everyone but themselves.
They would Sue the company that rented them the equipment, the people that they hit, the property owners who's tree jumped in front of them ect...ect...
I understand but on the other hand it's just annoying for me when I try to rent something. I have been pulling trailers for 40 years and everything from a 4x8 harbor freight trailer,
to triples in my tractor trailer across country.