And to add, since this implication and guidance is now 8 years old with no significant problems, it would be nigh on impossible to contest it successfully from this point forward.
I'm afraid I don't quite see it the same way as you.
We are having erosions into women's spaces now - there have been numerous citations and examples. Including women's prisons, the NHS, women's sports.
But one question - if it really is as simple as you claim - why won't TAs even discuss it? Why are TAs shutting down meetings, punching feminist grandmothers, trying to shut down mumsnet? Why the #NoDebate - if this is as risk free to women as you say - then we won't have a problem, will we? You will be able to provide clear evidence that our fears are unfounded.
I suspect the reason is you know we're right. Incidents are happening right now. Self ID is a serious threat to women's privacy, safety, dignity, equality. You just want us to shut up and stop raising awareness.