You know, you had a thread not that long ago asking the same thing, with even some of the same descriptions, and got lots of good input. You might reread it.
It seems pretty clear that some people “claim” they’re disabled and really are, and some aren’t. You’re in a job where you see a lot of false claims, but I wonder if you don’t overcompensate by judging people who truly are disabled as though they’re trying to cheat the system.