> I have a math brain. Where do you think that math brain came from? There are only three factors that could really influence it: 1. The way you were raised.

> I have a math brain. Where do you think that math brain came from? There are only three factors that could really influence it: 1. The way you were raised. 2. Your genes. 3. Some metaphysical explanation. I'm going to set #3 aside for a bit because there's no way to test that hypothesis. That leaves the way you were raised and genes. What correlates with the way you were raised? Culture. Your parents' culture is tightly correlated with the way they raised you, and when speaking about groups and averages it's fair to say that in general affects outcomes. So if you take this explanation, TFA is not wrong to say that culture would affect outcomes. What correlates with your genes? Your ancestry, which is (imperfectly) correlated with race. So if you take this explanation, OP would not have been wrong to say that on average race would affect outcomes. (That said, I don't think they actually do—they strictly mention culture!)