the starting point should be that an individual decides which label feels right to them
And the end point?
That's the problem your fluffy niceties don't even begin to acknowledge, let alone address as real life issues.
I am not going to repeat the entire contents of the FWR board but, when transwomen started referring to themselves as women we women said "OK! That's nice." Then transwomen said that as women they could do anything, go anywhere women go. Some women said "Wait a moment, no!"
Then came the label wars:
Political parties referred to "trans women and non trans women" - note which came first on that list in contravention to every listing principle going!
We also had the unintentionally funny UNWomen
And not forgetting cis women - a label women, in droves let alone as individuals, say they will not accept it does not feel right - but you still say it is OK to force it upon us!
Now transwomen claim to be female, to have actual female genitalia, etc.
And women are raped, bullied, hounded out of work, hounded by police, threatened, doxxed, forced to spend hundreds of thousand of pounds to protect themselves against those people appropriating the term women.
So, even with that slimmed down version, can you see why words are so important and why so many women, and the majority of all people if asked a clear, unambiguous question, are saying NO!