As I continue reading....on my supporting side I would add that also look at the difference between who is using this type of towing equipment and how they enter the picture.
Heavy truck side guys: trained/schooling, working with other very experienced truckers, testing.
RV industry: pull up to the dealer and possibly get a fantastic guy who rv's himself OR get a minimum wage guy who doesn't know much and may be being ridden to hurry up and get back to installing that epdm roof that has to go out today.
They are both going to go through the delivery gig and the customer could be a trucker or a guy who has never pulled anything OR his wife who happens to have to drive because her husband broke his right foot 2 days ago and they must pick up the 5er. They can all jump in after the dealer hitches up for them and drive away.
To me, It might actually seem like it would be mandatory.