If you think about the best stand-ups of all time, I would guess they made you re-think some big part of your life in a new way, whether it was a relationship or religion or kids. We think of great comedians as people who push boundaries and go after big targets, not people who tell knock-knock jokes really well.
So what happens when your material is necessarily restricted? When you can’t use certain words or bring up certain situations? What happens when a part of your set has to include a sermon?