it's not a feat of human ability at that point, it's a feat of technology.
besides, these things are really bad for you, and allowing it basically tells all those daydreaming kids out there: "go ahead, ruin your life for the almost imperceptible chance you might actually end up a star."
but of course the war against doping is kind of a rear-guard action. there will always be new PEDs that beat the piss tests...