Autism is a disability. The function of the brain to normally process social cues is broken. In the same way someone who is blind has broken vision, someone in a wheelchair has broken legs, and someone with ADHD has broken executive function.

This isnt a moral judgement, theres nothing wrong with being disabled, but it remaims a disability that many people struggle due to.

The disability exists when compared to neurotypicals but does not necessarily exist when compared to other autists.

As a comparison, if you put a bonobo with chimps the bonobo will be severely disabled socially, but it won't be when compared to other bonobos.

The fact that autists can communicate with each other does not fit typical models of disability. A blind person should be blind to another blind person.