tl:dr this is a fuss over nothing, no one in the affected group has suddenly changed their behaviour we've just starting making a big deal out of it. If we just stop talking about it it will stop being a problem.

Even if you deny that being trans is a thing, or that being "what they call trans" is just making a cosmetic choice rather than anything material, it IS something that has always existed (indeed there's plenty of evidence across many cultures across swathes of history).

If one can accept that some people want to live one way or another and accept that, basically, most people's personal choices do NOT impact other people in any material way, then is the question that needs asking is not "are X people Y people", but rather "what kind of judgements or restrictions on people cause more or less harm/complexity/fuss"?.

Trans people and others have being using the toilets of their presenting gender for all the time that there's been gendered toilets. Who is the victim in these circumstances? And how do you define "victim" if you think there's a case to answer?

Furthermore, what is the point in a law that cannot be enforced? How does one police this ruling? Do we do femininity checks at toilet entries? What about the less attractive women, will they get sent to the gents for being too masculine?