The solution to that, however, is not to call myself agender, to try to slip through the bars of the cage while leaving the rest of the cage intact, and the rest of womankind trapped within it. This is especially so given that you can’t slip through the bars. No amount of calling myself ‘agender’ will stop the world seeing me as a woman, and treating me accordingly. I can introduce myself as agender and insist upon my own set of neo-pronouns when I apply for a job, but it won’t stop the interviewer seeing a potential baby-maker, and giving the position to the less qualified but less encumbered by reproduction male candidate.So if you want to call yourself a genderqueer femme presenting demigirl, you go for it. Express that identity however you like. Have fun with it. A problem emerges only when you start making political claims on the basis of that label – when you start demanding that others call themselves cisgender, because you require there to be a bunch of conventional binary cis people for you to define yourself against; and when you insist that these cis people have structural advantage and political privilege over you, because they are socially read as the conformist binary people, while nobody really understands just how complex and luminous and multifaceted and unique your gender identity is. To call yourself non-binary or genderfluid while demanding that others call themselves cisgender is to insist that the vast majority of humans must stay in their boxes, because you identify as boxless.
The solution is not to reify gender by insisting on ever more gender categories that define the complexity of human personality in rigid and essentialist ways. The solution is to abolish gender altogether. We do not need gender. We would be better off without it. Gender as a hierarchy with two positions operates to naturalise and perpetuate the subordination of female people to male people, and constrains the development of individuals of both sexes. Reconceiving of gender as an identity spectrum represents no improvement.