I used to be a goth when I was younger. Keys points needed to for this:
A sense of superiority over people not goth. (Note this was to mask my over all sense on inferiority and difficulties fitting in)
A space to look more different and more exciting than boring old normal people.
A belief that our conversation and understanding was way deeper and more insightful than mere ordinary humans.
An absolute crippling social anxiety. Being with other goths provided protection from that because we all had our issues, one way or another.
Most importantly, goths were all sorts of people from all sorts of backgrounds. Some just like the music, for some, it was their life, their whole identity, social anxiety, mental health of varying extremes, autism, it just gave us all a place to fit in, with other people who also struggled and needed a place to hang out. And for some, they had far more serious problems, whilst residing under the goth descriptor.
I don't think NB is much different to that.