So ... I probably shouldn't write anything here. Anyway, in the spirit of learning and communication and respectful dialogue ...
I think one of the tensions here is between people who think that providing one non-gendered pronoun is a sufficient individual vs. societal customization setting versus those who think that every(-ish) stated individual pronoun choice being mandatory is the appropriate and respectful customization setting.
I first started thinking about these issues not from a trans / non-binary / fluid direction, but from the point of view of removing unnecessary gendering when it was irrelevant to the situation under discussion. So, from that perspective a single unambiguous non-gendered pronoun seemed sufficient.
I wasn't looking at things in terms of providing people with fine-grained customization to express themselves.
I find the desire for fine-grained gender-expression customization in tension with the desire to de-emphasize gender. But I can also see how he/she/they sounds suspiciously like he/she/other(not normal) and could be interpreted as alienating or insulting.
I still don't really understand, but frankly I don't have much skin in the game.
I'm half and half white/black so I've never really felt the urge to identify with either. I identify as a tennis player or scientist or programmer.
We live in a society where these days lefties are not disadvantaged, although they were brutalized in the past, and I see no intense desire among lefties to identify as lefties. It makes me wonder whether, if we did not brutalize non cis-gender conforming people, would we see such intense desire for recognition and affirmation of fine-grained gender identity? But obviously we don't live in that world yet.
I may have offended someone here, but I hope it's clear from my care and tone that it's not from a place of disrespect, but one of unfamiliarity and desire to understand.
EDIT> By "lefties", I mean left-handed people.