Did you watch the video I put in my comment? It explains the different processes involved in sex differentiation.

Your argument has the same issues as many of the others of the same kind, it doesn’t reflect reality. You say there are biological differences, which we can accept, but, when a baby is born or when you see someone, those biological differences are assumed instead of being tested.

What I see is colloquial language and scientific language being equated.

• Society divided sex into A and B, doctors forced and keep forcing everyone into those categories.

• Science divides into A, B, C, D, E…, which are not easily perceived.

• Society, instead of adapting or accepting its limitations, decides to choose a characteristic to be scientific, but they don’t test anything. They are just being prescriptive with their language.

In other words, you can’t tell the gender or sex of someone by just looking at them. One piece of anatomy is not enough, one specific chromosome is not enough, one specific gene is not enough.