I think jumping on the use of the word "femme" is missing the point.
It was in response to the suggestion that someone who "looks like a man" would upset other women so the suggestion that TM should be included could be problematic.
I did respond to say I thought even if a woman who had transitioned "appeared" masculine, just as TW do not pass, the same for TM.
So if the PP had used the word feminine in response to the suggestion that TM shouldn't be allowed, they aren't talking about only women who look feminine or "femme" being able to attend.
This is a complete red herring.
It was in response to the original suggestion that TM would make women feel uncomfortable and but it was only one post.
Is part of the over reaction because "femme" is more associated with lesbian "butch" "femme" role playing that used to be common at one time. Or worse going back to the sort of Anne Lister "lesbian" were the idea was a woman with "male" attitudes would be same sex attraction. And also proposed in the dreadful Well of Loneliness. And I think Daphne du Maurier also though along those lines.
(Slightly off topic I once saw a woman who was with some man wearing a tee-shirt saying butch on the streets, femme in the sheets. I did wonder at the time whether that was more for her, or in fact more for him.)