It's so unlike trans activists to misrepresent opponents' arguments! I'm shocked, I tell you. SHOCKED!
Since you've innocently misunderstood the point, let me spell out the obvious even more clearly.
Let's take as an example a woman with MRKH syndrome, who was born with a congenital abnormality: an absent or undeveloped uterus. Notwithstanding that anomaly, she has a reproductive system organised around producing eggs instead of sperm, so she is unambiguously female. No male can have MRKH syndrome; one might even say that MRKH syndrome represents conclusive proof that the individual born with it is female.
I myself was born with a congenital abnormality: a bleeding disorder. I don't consider myself less human because of it, but my blood is demonstrably defective. That still doesn't make me a brand new type of human being, nor does it mean an inability to clot should be considered a standard trait of all human beings.
It's my good fortune that there's no anti-science ideological movement currently trying to hijack bleeding disorders for its own ends. Should that ever happen, though, I can promise you I'll fight to the bitter end not to have my medical history reduced to a glib and ignorant talking point, as gender identity ideologues insist on doing to men and women with DSDs.
It has come to my notice (I'm a continent away) that Nicola Sturgeon has again claimed I'm obsessed with her. This is, of course, true. I hereby repost my adoring review of her magnum opus, in which I attempted to convey the full magnificence of La Sturge.
https://t.co/ztLqUqYPZY