Surely you’re not trying to draw some conclusion between an entire countries modern day medical field and a theory a person proposed in the 1800s, right?
That would depend on whether anything has changed since the 1800s. But that's very clearly not so -- consider that recovered memory therapy (https://en.wikipedia.org/wiki/Recovered-memory_therapy), based on as much science as drapetomania, was practiced in the 1990s, and still has adherents today.
Also, for human psychology to be regarded as a medical field, it would have to be based in science. But human psychology studies the mind, therefore by definition it's not based in science.
https://pmc.ncbi.nlm.nih.gov/articles/PMC3480686/
> Fate, which takes away healthy, free, young people, never pardoned me once. It has let me live all this time, quite lucid, but closed up in here ... since I was ten years old .... eighty years in psychiatric hospital for a headache
Take modern medicine with a grain of salt.
Understanding changes as we do more research into a thing.
Im not arguing people diagnosed with autism spectrum disorder shouldnt get benefits.
Its that the spectrum isnt as related enough that insividual disorders would make more sense. But that would require getting the health insurance industry to do more adjustments.