“Biological (insert gender here)” serves as a dogwhistle for a lot of organizations that actively push trans bigotry. It gives a fake impression of a scientific take on sex that really hasn’t been embraced by the scientific community for about 50 years at this point.
They aren’t telling you what to think here, they are alerting you to a tool that organized bigotry is using and giving potential tools to subvert it. Once you see “Biological man/woman” for what it actually is (non-scientfic false categorization) it really can’t be unseen.
Also - Can we stop with the calls that people are trying to control what people think? It’s pretty lame. There’s nothing about this interaction that is trying to force you. All that’s happening is you’ve denied that a certain school of thought is valid. You have stated your reasons why you think it’s invalid and now people who have taken upthat school of thought are defending their position. That’s just normal discourse.
Give you a hint. When people tell you “they are trying to control what people think” that’s actually doing more to control people - because it’s asking someone to take it on someone else’s faith that there’s nothing to be listened to rather than engaging with the arguement yourself.
Actually more complicated than that. Sex is broken up into a bunch of factors. Phenotype is the word used to mean the grouping of characteristics we associate with either male or female. So that roughly covers genitals, secondary characteristics (boobs, body hair, build differences etc)… But it’s actually wild.
Chromasomal sex - On it’s own means very little. If you have say an XY chromasome but for the sake of example an androgen insensitivity you develop as (phenotypically) female in the womb.
Horomonal Sex - Is the mix of horomones that impact development. Whether you develop to appear male or female starts in the early stages of development in rhe womb and then kicks into high gear as puberty and can change unexpectedly. This means for example that there’s people who were born appearing entirely female and yet naturally develop along male lines later and vice versa.
Internal reproductive Anatomy - This one gets crazy where individuals don’t always have internal organs that match their chromosomes. You can have opposite, none, both.
The precursor of trans medicine involved a lot of case studies seeing how naturally occuring variation in biological sex worked and the more it was studied the more scientists began to panic because they realized that the model of sorting into two strict sexes was flawed. There’s a lot of people out there who live practically their entire lives only to realize at the doctor’s office that they have surprise characteristics quietly existing hidden just below the skin. This lead to scientists realizing that for the most part the idea of phenotype and indeed a strict definition for biological sex is actually pretty wishy-washy.
The reason you weren’t taught this in high school is more or less that they just don’t prioritize it because they have to coach a group of students, many of whom are not scholarly material, through an overview of stuff. High school biology is basically all technically wrong because it’s been simplified to give you a taste of the discipline. If you start going to med school the first thing they do is tell you to light everything you think you know about the body on fire, throw it in the trash and start from scratch because half the stuff you were taught is going to need be unlearned. “Chromosome = sex” is one of the things that goes in the burn bin.