Re: I'm not being redefined though. I don't magically become any less of a woman if trans people are accepted for who they are and more visible.
Case in point - something I found concerning just this week.
A friend's daughter received a survey from her school seeking students' input on the length of break times to ensure the timetable is meeting different students' needs. One key question was: "Do you have enough time to use the toilet currently during the school day?" Survey results are to be analysed by tutor group (of about 15 students each).
The opening question was: "Do you identify as A) a girl or B) a boy?" There are a significant number of trans students in the school, apparently.
Think about this, @ScremeEggs. Please think about it, and more than the teachers who designed the survey presumably did.
10 years ago, the opening question would have been male/female, and consequently the data would have exposed any issues that girls (in the sense of the old definition, of female), have relative to boys due to their obvious additional toiletting needs.
Now, because of the opening question and the small numbers involved, any disadvantages suffered specifically by girls in a particular tutor group due to their timetable may well not be identified.
These girls ARE being re-defined, in the most literal* sense possible. These girls ARE "becoming less" in a very real sense, too - they're no longer recognised as a unique group with particular needs, and as a result these needs are no longer being assessed and addressed. Everything* you say isn't happening in the quote above is, actually, happening - and in just this one instance that I came across within just the last 5 days.
(Oh, except the magically bit. Cos there's nothing magic about it, and this trite tone in response to girls' needs being obscured in this way feels depressingly dismissive).