This is the issue, not how politely we state our boundaries.
Quite.
When you think about it, it suggests that if female people would just ask male people, very nicely, "Please tell us the way you would like and feel polite enough to accept our 'no' and that we need spaces of our own?" it might work.
For a start: why is this something females have to beg males for, that is in the male gift if female people please them sufficiently? Isn't that seeing the whole thing in ridiculously sexist terms?
And secondly, it will fast come down to it: it has nothing to do with women not asking 'right', or being 'nice' enough or 'polite' enough, or looking unpleasantly (to males) unfeminine in their using unladylike language and terms and being more aggressive than is nice to see in a female person, and male people sadly waiting like disappointed daddies until little girls learn to do better.
It has to do with there is no way to achieve this agenda without removing all consent, say or rights from females. It's just a lot of timewasting sexism to avoid confronting the real subject and issues, largely because to do so makes male people look bad.
Hence phrases becoming important that make clear: in deciding what female language and boundaries are, it is ridiculous to be pleading nicely with males for a seat at the table to be allowed to participate with their betters making such decisions. Female people are the table.