And importantly, offending someone today is much more likely to have serious consequences than it was 10 years ago (that's my perception, anyway). A decade ago if you wrote something innocuous (especially while having the wrong immutable characteristics) and someone wrote your employer demanding your termination on the grounds that your innocuous thing could be interpreted as 'hate' by virtue of some absurd mental gymnastics ("well if we change the definition of 'hate' in such a way as to encompass innocuous offenses, then voila, your employee is guilty of 'hate' and should be fired!"), your employer would likely have told that person to piss off.

Note also that a common use case for pen names was to establish credibility when one's identity (gender, race, etc) would be used against them. I don't know that many anonymous writers are trying to conceal their gender or race these days, but I certainly see many, many more rebuttals that are some variation of "the author is wrong because of their identity" or rather "the author is not only wrong but evil/hateful/racist/otherwise-deserving-of-cancelation because of their identity" than I did 10 or 20 years ago.