This is begging the question. The obvious intention of sex segregated spaces in bathrooms and changing rooms and so on is to protect women (and men) from lustful eyes, based on the assumption that everyone is heterosexual and cis.
It is obvious, in these modern age, that these assumptions are false. Cis women can lust for other cis women, and do so in far greater numbers than exist trans women.
We've been over this before. You are wrong. There are multiple biological reasons why the risk profile from lesbian sexual attraction is fundamentally different than the risk profile from heterosexual male sexual attraction. I really don't feel like repeating it all here, but they aren't comparable. There's no assumption involved there.
There are ways to achieve bodily autonomy and ensure privacy that don't trample all over trans rights.
That doesn't answer the question, at all. You're avoiding it.
I don't think there is some inalienable right to preserve specifically the communal cis-female naked space, and anyone who insists on specifically this as a solution to bodily privacy sounds an awful lot like a pervert to me.
The question is more generic than you seem to comprehend. The fact that you cannot recognize this is itself telling, and indicates a profound ignorance of female concerns. I'm not a female, and even I recognize that it's not just about
communal female naked space.
I'll give you an example. Suppose you're a woman, and you've been arrested under suspicion of a crime. The police want to strip search you. Is it reasonable for you to expect this to be done by a female officer? This isn't a communal space. You can't solve this question with optional individual stalls. And in this case, guess what: you don't
have any bodily privacy from whoever is conducting the search.
And cis-female is a ******** term. I can accept ciswoman to distinguish from transwoman for clarity in certain discussions, but there's no such thing as trans-female, and so cis-female is meaningless. Biological sex is immutable in humans.
But back on topic, the original question still stands:
Under what circumstances do you think it is appropriate that a female be allowed to expect that they are only in the presence of other females?
It's at the heart of this entire debate, and you're still avoiding actually answering it.