"
And again, it's a shit argument. If a burglar is determined to burgle my house they probably can. If a murderer is determined to kill me they probably can. Does that mean we should therefore give up all laws against these things, security and measures to protect ourselves? No."
Fine - make the laws against transwomen using women's bathrooms even stronger, then. Make them as strong as you like. In reality, they won't make a bit of difference, will they? Attacks by transwomen in women's toilets are a vanishingly rare occurrence and nobody can think of a sensible way of policing it.
The law doesn't like to be made to look like an ass, though. Those involved in making it try to be careful in that way. Thus there isn't a law against, say, leopards using women's toilets, on account of leopards very rarely break into women's toilets (in the UK, anyway) and even if they did, the law could do nothing to stop it. Predators are like that. ;)
I think some common sense and realism needs urgently to be injected into this (largely non-) issue. We're being asked to think of a predatory sort of man deliberately dressing up in women's clothing, with a wig and some make up too, presumably, for some reason believing that a women's toilet is the best place to target women. Really, think of that: predatory sorts of men are generally the sorts who won't even wear pink tee shirts for the 'shame of it'.
But OK, let's assume there are such men. We're thinking of a daylight toilet attack, since we could assume that at night, when there are very few people around, and the toilet in question is one of the few that's unlocked at night, there'd be no need for a man to disguise himself as a woman. So: there's this man, dressed as a woman, who attacks a woman in a women's toilet ... and assumes his disguise won't be noted and reported ... and the police won't be able to pick him out in a crowd as he runs off afterwards (hopefully for his sake not in heels)?
No, I don't think so. I'm not a predatory man but if I were ... to be honest, I actually can't think of sillier way of doing my preying on women.
Frankly, if you really want transwomen to be kept out of women's toilets, your best bet isn't the law, it's to rely on transphobic women - because cases of women beating up transwomen in women's toilets are somewhat less rare than the reverse. That's perhaps why transwomen avoid using public toilets for men or women as much as they possibly can.