His jokes are pre-programmed. Yes yes I know they have to be but it does mean that he just has to stand there. No real comic timing necessary. He doesn’t have to deliver his lines
"His jokes are preprogrammed" . He writes the jokes himself! That's the hardest part. He'll practise them, try them out and adapt them. He has to choose what to say and when, by gauging the reaction, having considered all the possibilities beforehand, including ditching sequences that aren't working and having responses to possible hecklers. It's silly that you should imply that it's somehow easier for him.
And as for the "disabled card" poster... do you think disabled people can't actually have real talent?