You can't just claim a political movement controlled the public zeitgeist for 50 years without some serious citations.
When I started my career in the ‘80s, I worked at a large metro daily newspaper. There were certainly gays and lesbians who worked there (probably a hundred or more), but you wouldn’t know it because not a single person that I recall out of nearly a thousand people was “out”. Why do you suppose that was? It was because people were afraid of ostracism and losing their jobs and livelihoods. If that wasn’t the equivalent of being cancelled…tell me what the hell was it?
Also, fast forward 40 years—do you think you could find a news organization in the US today with no one out? Attitudes have changed and they have changed because the left was vocal and had political power enough to change culture.
Perhaps you don’t believe that, or you wish it happened faster. But don’t denigrate the progress that liberals made over the last 50 years, while it may be slow progress it’s progress that will stick.