Not to mention is all precisely what the original LGBT activists were working against. The ones that original held the "___ is a CHOICE" mentality were actually the bigots and the naysayers to the original LGBT rights activists, now it's the attention seeking label whores who insists it's a choice to protect their identity politics. The pendulum has swayed to the opposite side of the political spectrum, but it's still regressive talk, no matter who's saying it.
People whose insistence that there have been "nonbinary" genders for an eternity cease to, in actuality, recognize the original LGBT activism aim. They strived for normality, not for specialization. That's what they wanted. Understanding they "differed", but wanting to be seen as normal, as people, in spite of that "difference" in presentation, whether it be a different sexuality or transgenderism. They generally didnt aim to be snowflakes.
There have been attention seeking brats in all forms throughout the years, and there have possibly been attention seeking brats who've identified with this "nonbinary" label before its popularity was capitalized by the web, but that doesn't mean they're actually lgbt nor a proper representation of the group.
There are plenty of LGBT people who've rejected transtrenders as supposed to welcoming them, that's what everyone doesn't acknowledge. Some only welcome them out of fear that they'll be branded a "cis shitlord", especially if they're considered to be less opppressed- i.e. a gay cisgendered male, as supposed to nongender flake (read: overly hormonal bitch of a female) too. I mean, part of the lefts gone crazy but that doesn't mean there's still not rational people in the LGBT circle either.