It's hypocritical to consider "transgender" to be a "real" thing but not "transracial". TQs say a man "identifying" as a woman is a woman because he "identifies" as such. Either "identifying" as something makes you that thing, or it doesn't. If it does, "transracial" should be considered a thing. Someone white "identifying" as black would have to be legally seen as black, but the reason they aren't is because trans right activists and TQs are hypocrites. They understand "identifying" as another race doesn't make you that race even if you try hard to medically or surgically change skin color. They should understand no matter how many times someone has surgery or takes hormones, they can not say they are another sex either. Either "transracial" and "transgender" are real things, or "transgender" and "transracial" are not real things

(Note: I'm argueing from the transmedicalist/truscum position)

This completly ignores what transgender people mean when they say "I identify as a man/as a woman". It means that the person in question is distressed at their female/male physical sexed characteristics, strongly desiring to have male/female ones instead (this being called gender dysphoria). It has nothing to do with gender roles or gender conformity. There is no such thing as "racial dysphoria", as in, the person being distressed at their physical ethnic characteristics, it is all about the cultural roles of the ethnicity in question. So, a transgender person in a world without gender based stereotypes/gender roles would still be a transgender person (as in: still distressed about their physical sexed characteristics), a transracial person would have nothing to base their "identification" on. The poster child of "transracial", Nkechi Amare Diallo (formerly known as Rachel Dolezal) is less comparable to a transgender person, the gender equivalnet would be more a gender non-conforming person who pretends to be the other sex in order to follow the gender role of the other gender.

It's also not "birth sex". It's sex. 🙃

If sex doesn't change (your position) than birth sex is the exact same as sex, meaning my use of the term is merely unnecessary specific. If sex does change by medical transitioning (which, again, some people do claim) it is a necessary specification. I'd rather be unnecessarily specific than fail to be necessarily specific.