I don’t see “Politically Correct” as a term progressives would coin. Especially since the people most often using it are “tired of being Politically Correct.” That of course is a dogwhistle for hate speech. It makes a mockery of asking that people be treated with respect. And I think accepting it was stepping into a trap. There’s nothing political about it.
I think Liberals should quash the term. Instead of saying something isn’t PC, just say it’s hurtful (or stigmatizing as Orions do). Instead of calling out a term as Politically Correct, say it’s more respectful.
It would be harder to make dog whistles out of “hurtful” and “respectful”, while still pretending to not be a bigot.