Thank you Flounder - genuinely.
I suppose I'm coming at this from a 'what if' perspective.
I too have shared spaces with transwomen and men. 99.9% of both are sound people. But we don't make laws for sound people.
Transwomen are the same as men when it comes to reproduction - so dont negate the hardship women go through when men just have to nut. The same as men when it comes to size and strength - so recognise it in sports policy. The same as men when it comes to criminal patterns, violence, sexual violence, (attested) sexual "creepiness" (just my opinion, but think of leering, placing hidden cameras, that kind of thing. Maybe I'm totally wrong on this but I don't think so).
Policy and law should recognise this, imo - because as I said , we don't make laws for ordinary decent people, we make them to protect normal people (to be clear, normal people of any gender identity or bio sex) against chancers and opportunists and straight out criminals.
Honestly, I'd like if you could tell me where I'm wrong, in case I'm worrying over nothing.
Politicians should look down the road at hypotheticals, worst case scenarios etc, before changing laws. And it's OK for women to point out massive safeguarding loopholes. We are not obliged to take on a higher level of risk because it makes someone else happier.