@Hyolobrika I do not identify as nonbinary. It is just what I am, and what I always have been.
The refusal to provide legal recognition is upsetting for many reasons, including that there is no good reason not to. It costs very little, and updating systems can be done piecemeal over a period of time.
It's just gross to be told my birth certificate is invalid.
I have government departments claiming I'm legally a sex that does not match any identity documents that I have.
It's infuriating to me, it upsets other nonbinary people, and that is enough. We don't need to be able to articulate reasons to want something that most people take for granted.