Very true.
I am of the opinion that pushback against nonbinary people and bi/pan people comes from a similar place. Our society defaults to binaries and very much wants us all to "pick a side" both in terms of gender identity and sexuality. Refusal to conform is still taboo, and nobody in our community is more discredited and invalidated than bi/pan people and nonbinary people.
Forcing people to pick one side of the binary is not just pushed upon us by cishet people either, but also by binary trans people and cis gay men and lesbians who mirror cishet society in some subconscious effort to be labeled on of the fabled “nondifficult” queers. In this sense, your most privileged (cis, white gays and lesbians) become agents of cisheteropatriarchy so that they can ultimately avoid being the ones being thrown under the bus. In reality, they're so focused on tossing us under there that they can't see the next bus coming at them. No marginalized person actually gains anything by bowing down to their oppressors, but your average cis, white gay chooses temporary comfort over longterm queer revolution nearly every time.
Anything not rigid and binary gets labeled as infantile and demanding, despite the fact that the vast majority of queer people are, in fact, bisexual, and there are likely more nonbinary trans people than binary trans people. And that’s what terrifies bigots- when we acknowledge, accept, and embrace those who don’t fit easily into binary gender or single-gender sexual attraction, the LGBTQIA+ community becomes a LOT bigger.
It’s almost like those in positions privilege have vested interest in queer people not becoming too numerous and powerful 🤔