This isn't about the right-wing dogwhistle of "political correctness" at all. It's about not letting networks of fake users (bots and/or individuals claiming to be someone they aren't) spread false information with no input from real people. There are plenty of real, unrestricted "politically incorrect" people on Twitter right now. The difference - as it pertains to this discussion - is that they are real people, not robot armies paid for by foreign adversaries.

Yes, some of them have been banned, and sometimes the reasons for those bans are dubious because Twitter does not consistently enforce their policies. But that is a separate issue from what's under discussion here.