I don't fuss about it, and I totally get that it can be helpful in ambiguous situations. I see it used a lot in virtue signaling, and that annoys me a lot.
I can see the solidarity angle, but I guess I'm old school and feel like the best acceptance of others is just to live and let live.
I mean it, just like it is defined.
https://en.m.wikipedia.org/wiki/Virtue_signalling
I have been shamed for not providing my pronouns in Slack. I think it's not important for me to do because it's easy to tell my pronouns by our language. If it was ambiguous in any way, I would feel comfortable providing them.
I do not shame or care if others use them regardless of their reason (support, clarity, etc) up until that reason is to passively or actively shame others.