Much like William Shatner, they were typecast and found it very difficult to get any work.
"Ah, yes, Mr Orgblatt, I see you've applied for a job working with the disabled. Unfortunately, I don't think you're the right person for this position."
"But I have all the qualifications!"
"I'm sure you do, but a heavy hand is not what these people need right now."
"What are you talking about? I can be as gentle as a kitten!"
"And add to that the fact that you disabled quite a few of these people yourself..."