Pretending that transwoman are not male so do not assault woman at the same rate as males is such a bad faith argument. Its not true, its never true. Many people think that Primark have reintroduced woman only changing rooms and they have a false sense of security.
I would have much more respect for the following argument 'Allowing Transwoman in to womans single sex spaces will increase the number of assaults on woman but the trade off is acceptable so that we can be inclusive to these people assigned male at birth. They are male, so they are entitled to more privilege than woman. You are collateral damage'
Now OK, I wouldn't be happy, but at least it's the truth. What we have now is dangerous.