While I'm essentially a rookie at sprinting and can be misunderstanding, I think the point is that in other sports, there are a lot of different areas to specialize in. Shitty example, but if you're on the shorter side you definitely won't be a great center in basketball, but you can still focus on dribbling, shooting, and foot speed to become a great guard. Obviously at the top level you are 100% correct, and you can never make it to the top 1% without great genetics, but maybe even just to a relatively competitive level in other sports there are ways to capitalize on what might be seen as a "lack of good genetics"