I think you're missing the point a bit, but I understand why one would. The point of asking everyone to label their pronouns isn't some sense of hollow solidarity for trans people, it's so that trans people can be given the decency and space to label their pronouns in a way that isn't ostracizing and isolating.

Yes, you don't care what pronouns people use for you. You're privileged in that you've never struggled with gender and gender identity in a society that shames and ridicules you for it. Giving people space to be themselves (in a very basic human-rights sort of way) shouldn't be narrowly dismissed as stupid and "a big deal to some people".