Eh, newtons theory of universal gravitation is still a theory, even if he had no access to particle physics, and even if later the Theory of General Relativity (among others) largely supplanted it. It’s also still useful (and used!) in most real life engineering situations. It’s rare where time dilation applies in say civil engineering.

That folks with Autism and ADHD may have large portions of their symptoms occur because they focus too much on some specific things, to the detriment of others - like emotional well being/regulation - can still be falsifiable (better than most psychiatric theories for sure!) and useful clinically.

Personally, it lines up with what I’ve seen and experienced.

That there is another (perhaps chemical, or brain structure) theory too doesn’t necessarily change that!

I don’t think it’s falsifiable until there are autism diagnostics that aren’t behavioral. Right now, they’re 100% behavioral, which that any theory that tries to cluster autism symptoms is hopelessly tainted by a recursive definition -> diagnosis -> definition cycle.