Nikolai wrote:For instance, I offer this statement: clearly, there aren't as many Asian polo players because of culture. But that statement doesn't mean anything. It could mean that that historically, polo isn't an Asian sport. It could mean that horses aren't as common in Asia. It could mean that Asians see something dishonorable about it. Or (just to toss out a hypothesis) it could have to do with how Asians as a general rule don't have the arm length for effective polo play. (Note that I say as a general rule, since there are certainly exceptions... some of whom play in the NBA. But the general rule means a lower probability of long-armed polo players.) 
Those are all valid explanations. You however tried to act like the only reason for such an underrepresentation could be the genetic one, while it is probable that genetic factors play a small role in most examples like these. Your hard science can explain why white people are in the top for swimming, but it doesn't explain why there are 
no black swimmers at all. Even in running, where black people are far better, there are still white people who run.
The analytical error that GT was talking about was that you seem to think that to find such genetic differences immediately means those are the reason. The fact that there is a genetic difference does not mean it has much influence. I never said that I think the info is false, I said that to point it out as the sole reason is particularly foolish in times like these where money and training matter such a great deal. We're talking about humanity as a whole, you can't explain it all by a few very basic scientific facts. Hell, it would be nice but the world is far too complex for that.
In short, the conclusions you draw from the information are not neccisarily correct and inherently flawed anyway. "Black people are genetically worse at swimming than white people." does not answer the question of "Why are black people underrepresented in swimming?". I love science, but any scientist will tell you that drawing conclusions must be done very carefully.