It's the reproduction of a class society. Some people are deemed worthy of it but most are not
If you treat people like morons they start behaving like them.
The reason (nuerotypical) people are studying in libraries and drunk in bars isn't because their fundamental constitution changes but instead, the context does.
So treat people right and they'll (mostly) reciprocate.
(I'm an exception to this rule somewhere on that vast spectrum. It's a handicap I assure you)