We’ve got a “lite”travel trailer, and to save weight they use really thin wood in lots of places. The “plywood” under the cushions of the dinette lasted 2 trips until my daughters knee went through it. The material reminded me of the balsa wood airplanes I played with. The floor is made of 2 pieces of a really thin plywood with foam between them. The floor feels springy when you walk on it.
Things can be made light and strong, but that usually is a more expensive material or construction method, neither of which I’ve seen on my trailer.
Unless you really need to save weight I would avoid the lite ones.