There really is something incredibly whiny about people who are prominent writers, have large audiences, but somehow manage to turn themselves into victims.
On the topic itself, I don't even understand the concept of cancel culture. All culture is cancel culture, that simply what culture is. A culture is defined by its delineations, what's inside of it and what's outside of it. All cultures, in all places cancel, all communities decide who is in and who is out, that's what defines a community, if nobody's excluded you don't have one.
What I suspect is not that the glorious past had a wider spectrum of opinion or no cancel culture, it's that people are mad that their opinion happens to be at the unpopular end these days.