@nauticant
As BuntingEllacott wrote, ideological TRAs are not doing this to support trans people getting services they need. One thing that comes to my mind is that arguments in support of the ideology sometimes require there to be many trans people and sometimes require there to be very few. Accurate data would compromise this fluidity in the basis of arguments.
This is an excellent point. The fluidity (no pun intended) of the arguments being used to undermine both Safeguarding and the rights of women and girls rely on a lot of mythologizing and passing on of dubious statistics.
On every point where better data has been sought, ideological TRAs have stymied it, be it medical research or statistical analysis. The only people clamouring for accurate, useful data are the ones being characterized as 'anti-trans' and threatened in various ways by the self-styled good guys.
This is a very, very important thing to keep in mind the next time someone tells you trans people are the most oppressed demographic of all. Ask them 'how can you possibly know without accurate data, and why would not want the best data to secure the best outcomes?'
It usually quickly becomes apparent who cares about trans people, and who is just a thoroughly unpleasant human who enjoys bullying women via any means possible.