You are right, yet the society is struggling exactly with what to add to the passport. And if you think about, why exactly do they need the gender/sex in the passport at all, in the age of biometrics? Isn't this a moot discussion? People fighting about a useless point, that's all what I see.

We're not.

We're struggling with the decision of letting a one handed man identify as two handed and vice versa.

The utter most ridiculousness of this mental gymnastics is calling women "womb carriers", that the sex treated as a baby incubator would have a problem with this is beyond some people apparently.

Qui prodest? Or rather, qui afficitur? One/two handed is not on the passport either, although it would make a much better identifier (for human agents).

It's not ok to celebrate peoples erasure.

I imagine border control find it helpful to have sex on the passport because in 99% of cases it’s an easily observable identifying characteristic.

Dunno about you folks but I haven't flaunted me willy in a long while at the gates. Joke aside, I said "biometrics" - in which a camera and a fingerprint scanner can do way better than feeling my underwear.

You can identify sex with high reliability just by looking at someone’s face in the vast majority of cases. Not in every case, but in the vast majority.

How is this relevant to a biometric border check?