
Originally Posted by
Gredival
Now it is unquestionably correct to say that, regardless of whatever else, their "assigned-sex-at-birth" was male. But this is different from asserting that their "sex" (no qualifier) is still male, irrespective of gender. The argument is that a penis is not the end all be all determination of either gender OR sex.
The issue with saying that a transgender woman is female gender but male sex is that you are saying "I recognize you as a woman and your right to identify as a woman, and you are entitled to all the rights and privileges of a woman. But you are, biologically speaking, still a male." The implication there is that they are different from other women, that there's a degree of legitimacy that can only be obtained via operation - something out of the question for many people. You're placing an impetus on them to "fix" something in order to obtain the equal status they seek.
And to my understanding, it is by definition transphobic to say that someone is something other than what they self-identify as. Regardless of whether you qualify that as "biologically" and regardless of whether or not they are pre-op or post-op. Transphobia is about "identity denial." Again the one exception is specifying their sex-at-birth which is incredibly specifically limiting.
This is the point where my limited expertise in the subject ends. I don't argue for or against this interpretation out of any sincere belief in it, I have adopted it upon the advice it is the least offensive and the way most advocates in this area present the issue.