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.
Never have I heard the expression "dog whistle" more than in the last two years, always regarding politics, and always from liberals chastising conservatives. It's like their "in group" slang.
enforcement consistency is the point of the discussion, otherwise Twitter can proactively or retroactively label anything 'spam' without describing how they [or their algorithm] arrived at that conclusion.
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.