The Sadowitz incident highlights how stupid and unnecessary cancel culture is. There is no need to cancel performances or to press for a blanket refusal of venues to take bookings.
Comedians, plays, art generally, need an audience. If their performance doesn't get received well enough by enough people, the performer or artist will gradually disappear off the radar. It's a natural process and doesn't need people to be "cancelled" - artists by their nature are self-cancelling if their material doesn't find an appreciative audience.
If there are enough people who enjoy the material to make it worthwhile, then what right does the rest of society have to say they shouldn't enjoy it. People like Bernard Manning disappeared from our screens and from bigger venues because the audience shrank.
Regardless though, I cannot fathom who would book tickets to Jerry Sadowitz without knowing how offensive he is. That's what he does, nothing is off limits. It's not even like the Jimmy Carr gypsy/holocaust joke, in that instance I can see how someone might have watched Carr on a panel show and not been expecting a genocide joke. Sadowitz is rarely on TV, when he was on Channel 5 a couple of decades ago he was as offensive as he could get away with.