I know this must feel like an exciting "gotcha" because GC all tell each other that trans people "literally don't understand what sex is", but I feel like this is more just a matter of agreeing or disagreeing with how things are categorized when they're referred to.

Humans use the word "rooster" to describe a chicken they identify as male. If there was a mutant female chicken that developed plumage and secondary sex traits that made it appear like a rooster, without an invasive inspection, people would probably identify it as a "rooster" and if someone said "look at that rooster", no one is going to say WHAT ROOSTER I DON'T SEE ANY ROOSTER. Essentially, I'm describing the "looks like a duck" phenomenon.

And I know, I know "but LEMUR, those people are WRONG tho even if it LOOKS like a rooster!" Sure. But if I wanted a picture of a rooster, and was given a picture of the mutant-chicken, that picture would serve all the purposes a picture of a (lol) "natal" rooster, because I don't plan on breeding the rooster, or eating its eggs, so functionally speaking, there's no difference.

This is sort of the issue I think a lot of people face around the trans issue. For people who are supportive of trans issues, it's not that everyone literally thinks "they're the textbook example of the sex they want to be, down to the chromosomal level". I think it's more that people don't care about what people have between their legs - they aren't doing the thing I see GC talk about on Ovarit where they scour the faces of people on the bus "looking for an adam's apple" or whatever weird "one cool trick to clock the transes" that's in vogue at the time. If they are sitting next to a natal woman, or a trans woman, it doesn't really change the bus ride or harm anyone to say "he sat next to some woman".

I have a friend whos a transman. He's said it better "I know I wasn't born a man. I'm genetically female. But because I pass, people see me as a man, so I am treated as a man. In that way, I socially occupy the role of "man" for the people I interact with. At this point, I just don't correct people." I'm paraphrasing, but it was kind of interesting. He wasn't the type to insist on pronouns or anything - he always maintained gender was a joke, and no one should take it seriously. When he was earlier in transition, he said people both confidently call him "he", and some people confidently call him "she", and then literally debate with each other over it. He never would tell them which was accurate because he thought it was funny how important people thought it was to KNOW what he had in his pants.

So... I think I'm fine with the distinction between "gender" and "sex", for medical reasons. Gender is a social construct, because it affects how we are referred to socially. Sex is your biological plumbing.