Many trans people that join the hijra community leave it due to the abuse. The ex-hijra community is one of trans women that has been around for roughly as long as the hijra community has been.
Here's a project from former members of the hijra community that left because of the abuse they faced in it: https://aravaniartproject.com
In any case, trans people have been around for as long as people have been around.
The western idea of transness is better (more freedom, less suffering) so of course it is seeing adoption worldwide. I'm the exact opposite of a cultural relativist. I think it is morally good for the best cultural ideas to win.
In any case it still doesn't change the fact that something resembling trans people have been around in every single culture for a very long time. It is because transness is universal, a part of the human condition.
The Hijra community (Indian trans/non-binary) has been around for thousands of years, and surgical castration has been one traditional way for them to achieve their identity during that period. It's not relatively recent.
https://rpl.hds.harvard.edu/religion-context/case-studies/ge...
In any event, I think in a free society we must start with the premise that all things are permitted and only with valid reason restrict that freedom. There are many valid reasons, but merely being critical of someone else's means of existence is not what I would regard as sufficient reason to restrict their personal freedom. At a minimum, potentially cognizable harm should be shown. And to be clear, I don't think there's any potentially cognizable harm to be found in someone conforming to their own gender identity.