I feel like I'm talking to a brick wall here.

Nobody is arguing that someone who doesn't train is going to be magically better at a sport than someone who does train.

But like you yourself literally just said, there's a reason everyone in the NBA is over 6 foot. Because when you compare a 6ft6 dude that trains to play basketball and a 5ft6 dude that trains to play basketball, then the tall guy is going to be better because of his biological advantage.

And that's why these people make up the best long distance runners in the world, because COMpARED TO OTHER PEOPLE THAT TRAIN FOR LONG DISTSNCE RUNNING they have a biological advantage.

Because again, to make this really clear. No one is saying that biology makes it so these guys can magically be world class athletes without training. But when they do train, they do better even when compared to people that trai just as hard as they do, that learn the same strategy from the same young age they do and practice it as a sport like they do.

If you took an average white European baby and raised them in a Kalenjin village exactly like any other Kalenjin, and trained them to be a long distsnce runner from a young age just like a Kalenjin, they would never be able to be the best at it, because of their biology, just like the 5ft6 guy will never get into the NBA no matter how hard he practices. Because their will always be other people practicing just as hard as he is, but with a biological advantage.

Do you get it now?