I've heard that before, that those full motion platforms could be damaged by being overloaded by the acceleration commanded by the flight simulation.
I always considered that a bit of a urban legend though. Maybe it happened at some time due to a misconfiguration or a bug.
However I would not believe my colleagues controls engineers at the FFS manufacturers would be so negligent to not limit the control outputs to a magnitude safe for men and machine.
As customer I would not accept it for sure. It's neither complicated nor expensive.