It is the whole 'superpower' schtick. Things like savantism and prodigy level skill sets are exceedingly rare, even within the minority of the divergent population.
It is an extreme manifestation of the peak and valley learning (talent) profiles inherent in the ND population. In nearly 100% of savant cases there is major neurological involvement (more often correlated with ASD2 and ASD3 or major neurological trauma like a TBI). A majority of these individuals will present with such an uneven talent (skill) profile that they are incapable of living independently and will require life long support. Such 'gifts' can often come at a devastating cost.
Yes, some people will have some innate talent for things like art, sports, music, etc...but a lot of skills are developed through simple determination, practice, and often, a lot of self education.
I can't walk across a flat surface without tripping, and I can string words together in a competent manner, but then again so can several billion people, many in multiple languages. Where precisely does a basic skill in literacy become a gift? It doesn't, it is just a skill I learned because it is required in order to effectively interact with the world in which I live.
The clichés like Spencer Reid's character in Criminal Minds or Dr. Shaun Murphy in the Good Doctor are the atypical presentation of a savant profile, (they have workable functionality within a real world setting, but again, this is generally not the case). Rain Man is a much more accurate portrayal of what savantism (the severity of the skill set imbalance presents).
Roughly 50% of savants are autistic and roughly 37% of autistics have a savant level skill. Roughly 25- 40% of autistics are nonverbal (many have benefitted from the huge leap in adaptive technologies). The majority of active members of autism communities like this forum tend to be ASD1, the peak and valley skill sets, while still prevalent, will be much less extreme, thusly presenting with far fewer savant profiles. There are many highly skilled individuals on this forum, but a lot of those skills were developed through perseverance and study, not just natural inclination or social blindness.