That's just because today we understand it better. What "autism" used to mean is a certain set of comorbidities that appear to be caused by autism combined with

That's just because today we understand it better. What "autism" used to mean is a certain set of comorbidities that appear to be caused by autism combined with external factors, but that's just because we didn't know how things were connecting to each other back then (and there appears to still be a lot to learn about that).