Looks like its you claiming that hill from where I am standing. This is about the most uncontriversial position ever. Stallman literally just published his pronoun post on his personal site stallman.org. He seems to have left his personal views out, as I see no mention of his pet version of a genderless pronoun construct.

I personally find it polite to call people what they wish, given it does not unreasonably burden my natural expression. No contradiction here with compelled speech or free speech, which are hills I am quite literally willing to die on.

This seems along those lines, allowing further investment by those interested in less common pronouns to express themselves, while not burdening those who are not, while respecting everyone by setting clear expectations for conduct.

Can you expand on your objection? Perhaps I missed nuance...