Gender is the cultural outcome of primary and secondary sexual characteristics and in no meaningfully physical way exist. In other words, we traditionally have a "boy" culture and a "girl" culture, not a gender. We are artificially indoctrinated and assimilated into a given culture based on primary or secondary sexual characteristics.
Likewise, it follows that all other gender identities are similarly a cultural phenomenon and not the outcome of some essential characteristic of the individual.
Gender cultures are, at least historically speaking, bad. They've generally been used to persecute people who aren't in the dominant (boy) gender, and the conditions dictating mobility between genders is so intensly arbitrary that it warrants abolishing the whole stupid idea. Gender dysphoria is a symptom, generally, of the tyranny of these conditions.
(PS, I totally am open to being wrong about this.)
But these traits are secondary and tertiary sexual characteristics (ie they are tied to your biological sex). They are certainly the origin of gender identity, but they don't justify it. My dissatisfaction is not with the concept of sex. It's fair to say, "oh that person has a penis, that person is a woman, that person is intersex," and we should strive to develop better, more diverse sexual classifies, but gender? Na.
Gender roles/ jobs, fem and masculine, the separation of media to cater towards one gender or the other, the gendering of clothes, attitudes, and opinions, and finally the gendering of sex. It's all just caveman talk, imo