I'm not sure that this is a problem specific to feminism.
I've noticed a similar thing with other SJ topics, there is this sense that they are all part of one big equalising (whatever that means) movement.
Which in some ways people maybe always accepted, that all kinds of justice movements come from the same place of wanting what is right for people, and that is compelling no matter who they are.
But the edges seem very blurry now. I've noticed for example Pride branding seems to be mixed up with Diversity branding in a lot of people's minds.And I use branding purposefully, because there is no sense that there is a process involved in figuring out what all of it means, or should look like, or sometimes there could be disagreement or lack of clarity.
This business of everyone can be who they want to be seems to be one of the principles of the whole thoughtless pile of dung, except it (obviously) doesn't apply on race for some reason.
All that said - I don't know why these people don't try speaking as humans, rather than as feminists or women or anything else. It seems to me it would be a lot more relevant even if the thing she is saying is kind of dumb.