Rule of being a free speech absolutist

https://lemmy.blahaj.zone/post/536339

Rule of being a free speech absolutist - Blåhaj Lemmy

Why shouldn’t they be considered slurs? If my memory serves me correctly, they are almost always used with a negative connotation or in a context describing “cis-people” as doing something bad. Elon is just stating the obvious.
Interesting, I’ve only ever seen it mean “not trans”