Because the guys with steroids win, and the ones that don't, don't, all other things being equal (which they often are when we're talking about top-level athletes).
It's like Snaking in Mario Kart. It's not as if Snaking is "one way to win" it is THE way to win, unless the snaker is otherwise significantly less skilled than the non-snaker. An athlete who's good enough for the top level in terms of skill will always then be superior when he/she takes steroids.

Monster Hunter: pissing me off since 2010.







