I will use this logic(I'm sure it's wrong but what the heck). I feel like the ELEVs have a lighter load. They basicly change the angle of the wing. In a wall for example the wing is what takes the beating. The rudder on a knife edge is holding the plane at the AOA. The fuse is forced to make an airfoil, but the rudder is having to hold it there.
I may be proved wrong. Oh well. It's just a theory. Ask me about about a La-Z-Boy and it will be fact. Ask me about aerodynamics and it's a guess.

David