I'd argue that mildly autistic people had much better outcomes decades ago before we started thinking it was something to diagnose. My grandfather was probably autistic, but there was no internet to sink into so he had to interact with people and build some basic social skills. Out of high school he joined the Navy as a radar technician and lived in a structured environment that taught a lot of life skills. Then he went to college for engineering and was set up on dates with my grandmother (as a bit of a matchmaking thing). Suburban house, 4 children, married for decades, church. Generally a very normal and happy life, even if he was considered eccentric and sensitive to noises. I don't think anybody ever thought to diagnose him with it.

My brother is mildly autistic, too, but he has always had the option to skip out of socialization in favor of the computer, and we've lost the societal structure that helped my grandfather thrive.

I don't think it's diagnosis that helps people.