It doesn't talk about neurodivergent people, but about non-brain damaged people, whose brains can still do dimensionality reduction, which allows them to deal with problems efficiently.

The so called neurotypical people are people brain damaged from something, who slowly took over the society over the 20th century. Without dimensionality reduction, virtually everything they encounter is an overwhelming, highly dimemsional problem so they can't deal with anything, except for a narrow set of problems they specifically trained to deal with.