I call my wife “baby” but that doesn’t mean it is ok for random men to call her that. You are free to use ethnic slurs if you want, and people are free to point out that they are in fact slurs.
It's socially constructed, what's a slur. Something below a fact.
What, you downvoted to disagree? Look:
"We asked many members of the Gypsy, Roma and Traveller communities how they preferred to describe themselves. While some find the term “Gypsy” to be offensive, many stakeholders and witnesses were proud to associate themselves with this term and so we have decided that it is right and proper to use it, where appropriate, throughout the report." Women and Equalities Committee, UK Parliament. 2019.
Of course that was six years ago, maybe it's a slur now. Or maybe it's a slur to you, but not to them. Or it won't be slur tomorrow, or it's a slur everywhere but not on Tuesdays and except in Scotland. Socially constructed, see? Not factual.
