Maybe instead of posting an argumentative post you can consider the reasons posted then show, through your actual experience, where these fears might be unfounded. That would be positive.
Gotcha..... The reason and the only reason a slide cannot move is if the trailer frame is supported fully. Those that have, if they have, had problems and damaged there slide using stabilizers did not have the trailer frame supported properly or they were using electric stabilizers instead of screw jacks rated for the job.
I used to set up mobile homes, same principal. I-Beam frame and blocks and some with expandos. In this case the 4 screw jacks I have are rated over 24,000 lbs all together and more than capable of holding the trailer frame up without tires or axles without movement there for the slide cannot move up or down as long as the frame is supported.