Though the window of opinions you can express publicly has narrowed in the last decade, it's still much wider than it was a few hundred years ago. The problem is the derivative. Up till about 1985 the window had been growing ever wider. Anyone looking into the future in 1985 would have expected freedom of expression to continue to increase. Instead it has decreased.
Let’s apply his heresy test. Is his statement true?
It might be, but I don’t know how one could confirm it. What is apparently true is that the amount of expression has greatly increased since then because internet. So that’s the denominator. The numerator of “fired for speech” would have to expand beyond the proportion of the growth of communication for this to be true.
Do you know anyone fired for their outré opinion in the last few years? Do you know _many_? I’ve read stories of it happening in business, universities, government but I don’t know anyone who has gotten the sack for expressing an opinion. Maybe that means I’m a conventional mind safely surrounded by the same.
When I hear about “cancel culture,” I picture a speaker who wants to say something and not face the social disapproval which said things triggers. But that disapproval almost always comes back at them as speech (I think infrequently as a pink slip). So those claims ring as “Free speech for me, not for thee.”