It's not really the point of this thread, so appreciate I'm going off on a topic.
It just seems to me that we can broadly explain to a child how to recognise biological sex, how to recognise behaviours typically associated with 'masculinity' or 'femininity' (even if we are able to criticise them) or sexuality. Okay, maybe explaining sexuality to a 5-year-old is tricky, and probably unnecessary, but you can do so with a 12-year-old.
We have the words, the examples, the descriptors at our disposal to explain what the common denominators are in each area.
But explaining gender identity seems to stump even those who advocate for it most loudly. Some people have described gender dysphoria, but since gender dysphoria is not a prerequisite for a trans identity, that doesn't really help.
Sorry - I appreciate we are a long way from talkshow pronouns.
I think both are symptomatic of a society that has adopted certain expressions ('assigned at birth', 'gender identity') and behaviours ('I go by she, her, hers') without stopping to think about what all this means, and where it may lead.