This whole thread is nuts IMHO
Like trying to argue a tire rated for 150 mph is absolutely wrong for 55 mph usage. Light truck tires go straight, they turn corners, they are designed to haul lots of weight, and to squeegee water on wet road surfaces.
The only issues in my opinion would be if the tire max pressure load capacity exceeded the strength of the wheel, and if added weight amounted to more unsprung weight ratio then the manufacturer calculated for his axle and shock absorber designs.
"My radiator is too big"
"I have too high a bank balance"
"The road is too smooth"
Physics should have been and should be now, mandatory in high school. Fail physics, no diploma. Has anyone who disputes the appropriateness of using LT tires on a trailer bothered to telephone or email a respectable manufacturer, such as COOPER TIRE? Something tells me they would have "The Clue"