I don't think it's a black and white thing, everyone tries to fit in to some degree. Some more, others less.
I try to fit in to some extent, but it's not much what I can do, I think. I have limited resources, abilities, and my attitude may appear negative sometimes toward fitting in, but in reality I'm not that negative. It primarily stems from my personality that is tied to ASD.
Without trying to fit in I would certainly become more aloof and shut up in myself, any my anxiety felt due to the perceived uncertainty of the future and loneliness would skyrocket for sure.
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Another non-English speaking - DX'd at age 38
"Aut viam inveniam aut faciam." (Hannibal) - Latin for "I'll either find a way or make one."