Just because there are examples of dominance in a sport that is apparently not due to biology (Russian chess) doesn't mean that it never happens (West African sprinters).
Just because some racial differences (skin color, eye shape, average size, ...) are cosmetic doesn't mean that all racial differences are cosmetic.
Just because this is a conservative forum doesn't mean there aren't some participants here trapped in Politically Correct thinking.
Just because I've read two articles by Mr. Graves today doesn't mean I ever want to read another word of his.