A little goes a long way, I think. By that, I mean, I'm thinking about the childhood experience of many black American kids, or least the ones I knew coming up. It was subtley imbued with the notion that curiosity was problematic or, at the very least, inconvenient.
That included getting a speech like "don't look at shyt, don't ask for shyt" whenever we went into the store with an adult as a kid, getting told it was disrespectful to even ask a question or express an emotion or thought contrary to that of the adult taking care of us, or just being told someone else knows better for you than you do for your own damn self.
Thus, the foundation is laid early. All children are naturally curious, I believe, but if you grow up in an environment where your curiosity is an inconvenience for adults, like your inquisitions are deemed insubordination, it is easy to suppress that natural need to explore and question.
If you are unfortunate enough to go through life never having something to break you from that programming, then you may run it for the rest of your life and, worse yet, reproduce and indoctrinate your kids into the same ways.
Just my two cents.