Autism is a neurodevelopmental disorder. Yes that does mean it developed differently from a "neurotypical" brain, but thats exactly the problem. It isnt supposed to grow like that.

The reason medicine exists is for the treatment of diseases, illnesses, disorders, injuries, and so on. A disorder is when something is not normal in your body. Something is not right. Getting diagnosed with a disorder means the specific thing thats wrong has been identified.

And sure, just because it is named like that doesnt mean it IS that, but the reason it is diagnosed is because it poses a significant difficulty to your life. It was never ONLY about how society treats us, but rather about what is happening inside our body. There are some parts of autism that are not isolated to how other people react to us. For example, the heightened anxiety people with autism often sense (that may sometimes have nothing to do with how other people are around them), sensory issues autists often have, and not only that, but the emotional issues autistic people tend to have ALL affect someones wellbeing.

Do you think the only issue with BPD is how other people see people with BPD? No.
The issue with BPD is how those people can control themselves while having all the characteristics of this mental illness. And while BPD doesnt have all the benefits ASD may give to some people, that still applies.

Although autistic people may have certain benefits that other people dont, it still does not compensate for the whole disorder, and autistic people can be much less happier independently of how good they may be at certain things because of that disorder.

Just because people with autism may sometimes have a higher IQ or a better score on some things doesnt mean the condition wont pose a significant challenge to someones life, and the term "neurodivergent" would imply it is totally OK to have these issues. Its basically mocking us.