How often do you think that in radiology, they will draw blood on an unconscious patient in order to determine male/female?
How often do you think that in radiology they will ask a person whether they might be pregnant if they're unconscious?
BTW, male/female is NOT always accurate by blood test. It's not on/off, black/white 100% of the time. I know it's a really long pair of posts but upthread, I posted some variations on so called biological sex.
Yeah, no, you posted a twitter screed by someone who *claims* to be a biology teacher, who is busy conflating a whole bunch of things that ACTUAL biologists would reject as entirely fallacious and unscientific reasoning.
Sex is defined based on the type of gamete around which your reproductive anatomy is arranged. That does not require you to actually produce those gametes, nor does it require that every single element of that anatomy be present, nor does it require that your phenotype is typical for your sex, nor does it require that your karyotype is typical for your sex.
This holds true for the human species, as well as for EVERY OTHER mammal on the entire planet. It holds true for the overwhelming majority of vertebrates. It EVEN holds true for those very few species that actually CAN change sex, such as clownfish. When a clownfish's anatomy is arranged around the production of small mobile gametes, they are male. When they change and their anatomy is arranged around the production of large sessile gametes, they are female.
Furthermore, you are appealing to the existence of people with deleterious medical conditions related to their sexual development... as if it has anything at all to do with transgender identities. It has NOTHING to do with transgender identities. It is entirely and completely irrelevant to this topic.