That's not... what are you even on about? That's not how anything works. First of all I don't think anyone here is treating what he did as a joke, quite the opposite in my case, I've been saying that making it a bit is a supremely bad idea from a moral point of view, and that's without even going into what a stupid choice it would be professionally.
Secondly, who decides what job he can still do? Is that part of the law, that if you commit a crime you can no longer do the work you're famous for? Or is it just what you'd like to be the case? So if he shouldn't be allowed to be a comedian any more, should he be allowed to still do voice work? Can he be a plumber?
There are three groups who get to decide what he does next.
1) His victims. They had the right to speak out and if they choose, they have the right to make this a legal matter and see him punished by...
2) The Law. He's as much as admitted everything and a case against him would probably be open and shut at this point.
3) His audience. It's up to them if they can stomach his material, and they'll be able to vote with their wallet. They can boo him when he shows up unannounced to work on new material, they can walk out, they can avoid anything he works in. I'd like to point out that I can't even bring myself to watch his old stuff, as much as he made me laugh back then his material is tainted by what we know about him as a person and I sure as shit won't be seeing any new special he puts out, but that's me, that's the decision I made, and I'm not making that decision for anyone else, and neither should you.