This seems rather disingenuous to me. It would be very remarkable if all non-neurotypical people missed the same sort of "ultraviolet" signals; the region of mind-design space occupied by humans might be pretty small, but it's not so small that you can reduce it to a bimodal distribution without glossing over a lot of stuff.

In any case, CuSithBell wasn't exactly shy about associating the autism spectrum with his metaphor, so unless you're trying to argue that anyone three standard deviations ahead of the mean is necessarily on the spectrum, I'd hesitate to read too much past that.

(ETA: I am aware that "neurotypical" is normally used to mean "not autistic". This post was written under the assumption that the parent was using it at its face value, i.e. "neurologically average".)

Would you say that there's something like ultraviolet that <145 IQ people can see and >145 IQ people can't see?