My first thought is I have found having two at the rear of the CT handy at times when a slight amount of levelling is required to get the bed area level...... I know these things are not to be used as jacks so to speak but I've found by being able to lower one slightly and raise the other is an easy fix for a level CT.
But yep, you are right, I've heard on the rough tracks they can cop some damage, so I can see where you're coming from.