There is a neurological background in many personnality traits , NT or not, ours are just less common and sometimes can trigger some issues, that's it.
You know, science , DNA , neuroscience can break down everything into rationnal causes, we just dont have all the knowledge yet, and scientist don't search for things that doesnt cause problems, I guess.
Your condition is part of who you are, but it doesnt make you less unique, and it is not who you are entierely.
But I have the same questions as you, I mean , I dont realy know what is influenced by ASD in my life and what is not.
Even for NT, maybe in 60 years we will be able to know that any personality traits is caused by this specific neurological connection provocked by a specific gene or anything...
The question is not realy, Am I just autistic? But the broader question is more like, when everything will be rationnalized by science,how will we be able to still believe in the concept of the soul?(personnalities, tastes,behaviour, anything that make you different)