Besides the point since I've managed to fit in a socialized society, but even in the blank state, we live in a allistic (from the greek "other", like autism comes from the greek "self") and ablist society. It is a privilege that neurotypicals do not need the vast amounts of training to understand body language or when something is inappropriate.
At one point Autism was considered an appropriate diagnosis to describe my mental health situation, only to have this hypothesis destroyed when I moved towards a locale with much better contacts. Kids of gentrified middles professional class people in Eindhoven get diagnosed more often with Autism than locals. This
might have to do with the fact their parents moved to Eindhoven and simply didn't care much about fitting into the local traditions. People often underestimate differences between local cultures within jurisdictions and as such end up in a lot of misunderstandings. Psychiatry has externalised certain conditions to differences in brain, not noting the possibility that the brain changes in response to certain stimuli.
There are plenty of other communities of the disabled. Deaf have their own culture, so do blind, etc. Autistics are another one of them. And quite frankly they tend to have quite a bunch in common, typically being nerdy introverts although that's not necessarily the case. When I hosted an autistic science summer camp almost all of the children had common interests with me that I could discuss for ages. The best part was that I could advertise the strengths of autism which don't precisely because of the "disease" model that dominates - this is the offensiveness of your post - rather than the neurodiveristy model.
I don't think "Autism" is a disease either. There are certainly grave personal (and mental) problems if you get that particular diagnosis.
They've been distinct for at least 30 years and the issue is psychiatry is defining them in terms of externalized traits rather than the neurological differences.
There is a couple of overlap. Emotional dysregulation is a feature of Autism, Borderline and Bipolar disorder alike. But if you have tics, psychiatrists will lean towards Autism, unless you have Tourettes', in which case they will lean towards the latter, because the tics are already accounted for by another disorder. I'm still oblivious what the cutoff is like when Psychiatrists are to view Tics as a result of Autism and when it is the result of Tourettes.
Note that like Autism, Borderline and Bipolar disorder both are historically derived from Schizophrenia. Hans Asperger might have invented the "Autism" diagnosis to save high-IQ children who would have otherwise been targeted by the Nazi eugenics programme on account that they would have Schizophrenia. Unlike Leo Kanner, Hans Asperger primarily worked with children of an above-average IQ, and possibly there was cream skinning to get there.
I know what mindblindness feels like and you're incorrect. It's a general obliviousness to the world around you - you don't feel that other peoples' minds exist. I can get mindblind again when I get anxious. It's easy to get paranoid beliefs if you can't know other people's mental states. Childhood paranoia can be of the sort "no one likes me ~ everyone is being mean to me ~ everyone is against me ~ no one understands me" and that's all due to the *experiences* one faces due to the mindblindness and triggered by anxiety.
Everyone has mindblindness to some degree. Claiming the opposite is true usually lands you a diagnosis of Schizotypal Personality Disorder instead, which ironically has plenty of traits in common with Autism.
I was giving it as a counterexample between the two - Antipsychotics don't change autistic traits.
Antipsychotics don't solve problems in general. Hell, even its utility for Schizophrenia and Bipolar disorder is now under fire. Scandinavian countries no longer demand antipsychotic treatment for these disorders.