White people (and to be fair east asians with their high IQs and tranquil gardens) like quiet because it helps them think deeply, so it is of value to them. Brown people do not, they are like NPCs unable to imagine an apple with all the details of the skin of the apple and the way it reflects light, or NPCs lacking an internal monologue. Because they lack this internal world, it does not stimulate them, so they get bored. It is also why they listen to very repetitive very similar music over and over for hours and hours every day.

I don't even consider myself "smart". I for one have a pretty shit memory, when I try to do mental arithmetic or something I often forget the numbers I was working with and have to start again. However most people do not even bother at all. Their lives are completely different to ours, the very way they think is completely different from us. When confronted with a complex task or one of life's unexpected nebulous frustrating problems, they don't give it a crack, because it never occurs to them that completing it is a possibility and they wouldn't even know where to begin if someone convinced them it can be done. They just go through their entire lives like this, winging it, ghetto rigging, improvising.

In conversations with brown people on /pol/ I notice something similar, they will say something like "slavery built America" and never look at the details or analyze it. It never occurs to them to ask basic questions like "how much", so they are not even going to begin quantifying it and making a decent case, just blurt it out over and over as though this lends strength to their argument. We must tolerate crime and pay for their gibsmedats, because slavery over 100 years ago, in their minds this is a completely sound well rounded convincing argument. Or maybe they know it isn't and simply don't care, because the notion of actually caring what the truth is and holding to a consistent moral framework is just nerdy wypipo shit.