[furyofantares]

A characteristic autistic trait is having a narrow and deep tunnel of attention.

Perhaps so narrow and deep that you're unable to learn language, because it requires a more holistic processing, and less focus on individual components.

Perhaps so narrow and deep that you're overwhelmed by sensation, processing every touch, sound, sight stimulus individually, leaving little energy to put everything together.

Or perhaps only so narrow and deep that you are extremely focused on math. Or collecting insects. Or memorizing train routes.

I don't know if this is an explanation. But it is extremely plausible for a wide variety of outcomes to be usefully categorized by a singular trait.