I've had that moment* though I'm pretty sure I have Schizoid Personality Disorder, not Autism. Though the key difference for me I'd say is that I never really had an identity. That feeling didn't do anything for my isolation or lack-of-purpose though. I mean, unless someone wants to cryo my head and try to put me in a cyborg brain pod.

*= particularly more of a philosophical thing for me, things aren't literally one but there is vertical (individual organisms) and horizontal (groups) cooperation (organizations too, but they seem prone to dysfunction). Particularly in situations that should be a positive-sum game, not cooperating seems like tripping yourself.

I can easily imagine autistic people having less of a sense of identity. Being transgender is more common but also it could be a trauma response. My trans autistic sister has trauma from the "devouring mother" type of care that she got from special education while in school. Being trans complicates things, but she never had an identity before she transitioned.