I’m autistic and don’t feel any gender, and all the arguments in favor of it to me are just bullshit. The NB stuff does nothing but reinforce the construct of gender.
The fact I’m socially dysphoric, including aspects having to do with the gender imposed on my sex, does not mean I’m not male, because my body is. The singular they for specific persons feels too unnatural and something of a stretch on grammar, and it feels wrong to use it, especially for myself. I wouldn’t mind being referred to by the femenine, but deem it disingenuous as I’m not female.

Since a lot of trans and NB people are also autistic, I surmise they’re simply too deluded, and I’d say no-one ought to respect such impositions from mentally unsound people.