Having a trans identity is, contrary to the implications of TERFs, not more of an affirmation of gender than being cis, but it's at best barely less of one. It's still embracing gender norms, whether those on the other side of the binary or recently-coined ones for NBs, it is still reinforcing a gendered ordering of the world. No one embracing man/womanhood turns away from gender; by definition they all are at the same time embracing gender. Embracing NB-ism too is embracing gender, just a different, more-recently-coined system. Both cis and trans people need to reject gender, and it cannot be done in either case by merit of someone's existence. Asserting otherwise puts you in an unfortunate position, ideologically:

Having a trans identity is not embracing gender norms in a way that is relevant - that is, gender as a regime. The regime of gender seeks to brand babies born with vulvae with the female sex class and push them into gendered production & reproduction based off of this. That is why even a masculine, binary transgender man still fails to fully embrace gender norms. Yes, a conservative transgender man that otherwise upholds masculine ideals is preferable for the patriarchal regime, but even that cannot hold. See: homosexual Nazis. Since transgender people fundamentally contradict the logic of sexing, they cannot be completely recuperated into our patriarchal system.