What I see are flat bars that will flex when needed.
Campers are build without any engineering and yes they do flex a lot.
Playing with jacks on my camper I can have gap between slide and bathroom wall at 2 inches or ... 0.
What I like to see on my ties is something that holds the camper against front wall. Funny, shopping around for camper - found a listing of nice camper sitting on F450. For some reasons his tie-downs were placed with distance behind the cabin, so fast guns come vertically looking from the side.
Zoomed on the picture and he had nylon strap pulling one of the holds to the front of the bed.
If I would expect anybody to actually analyze those things, it would be bed manufacturers. The custom beds are design for winches, cranes and lot of other attachments and they have to hold.
Campers don't have any safety or reliability requirements at all.
