If a transwoman wants to share your space so what? Of course there is a tiny chance she could have a sinister motive but there is a far higher chance that she just wants to live her life the best way she can and may need some legal protection to do that.
How many women are acceptable collateral?
There are women being raped in the female prison estate by convicted sexual offenders who identify as women.
There are women having to self exclude from rape crisis services because organisations are refusing to provide single sex services, despite being allowed to due to the exemptions in the Equality Act 2010.
Female athletes are being cheated in sporting competitions by having to compete with males and are being silenced by their sporting authorities when they raise concerns.
I could go on and on. There are so many examples.
How many women are acceptable collateral?
And as we keep saying, self id means that any man, however they identify, can declare themselves a woman (no change needed to appearance or presentation) and access single sex spaces. If a woman raises concerns, she is branded a transphobe and subject to the silencing effect.
You really can't see how this could be abused by predators?