> You reference slow, natural evolution of norms. Those happen everywhere, not just in language, but they happen organically. People change and then they change what they tolerate, how they speak etc. It's not that someone decides "people now have to speak like this, so that they then change to become like me". That's the "creating a new man" approach that lead to endless suffering under the socialists/communists, though I guess now it would be "creating a new person".
That hasn't been true since the printing press and particularly the invention of the nation state.
> Everything is fine, because we've seen bad things happen before, so this isn't new, and only new things can be a problem"?
That's disingenuous. You know that if these authors were writing these articles in the spirit that these kinds of editorial limitations were a long standing problem that needed to be addressed, they wouldn't be on the front page and commented ad-nauseum. The entire selling point of this kind of article is that it is attacking some novel and dangerous schorge which menaces our very rights. They are broadly in the genre of panic-mongering.
What we consider "free speech" has existed since about the 70s. If you considered that paradigm to be free speech, in which there was virtually nothing you could say which would get you arrested but there were things you could say which could get your fired, then you must concede that what is happening now is a roughly equivalent level of free speech. If you find these new limits on your speech onerous but not the old ones, then your gripe is with the flavor of the speech which might get you fired not the fact that speech exists which might get you fired.
These articles are generally written by people who just happened to live lives and held values which were highly compatible with the rules of the institutions. So they are by and large, blissfully unaware of the previously extant limitation and how they biased the discourse.