Ironically, Bradbury likes to tell people that Fahrenheit 451 isn't about the thing it was obviously supposed to be about (censorship) because he now wants it to have been a metaphor for cancel culture.
he's been dead for a decade so I doubt he now wants the meaning to be anything. besides that he also never said anything about cancel culture he said it's about how tv turns you into a moron.
> In a 1994 interview, Bradbury stated that Fahrenheit 451 was more relevant during this time than in any other, stating that, "it works even better because we have political correctness now. Political correctness is the real enemy these days. The black groups want to control our thinking and you can't say certain things. The homosexual groups don't want you to criticize them. It's thought control and freedom of speech control."
It's about more than that - many people have lost their jobs, been de-banked, or even been arrested (especially in countries like the UK and Germany) for expressing their opinion publicly when that opinion was merely (a) what most people in their country believed in the recent past (< 50 years ago), and (b) a politically incorrect opinion.