Is anyone surprised?
They've been doing drugs at epic levels in cycling since the 60s.... Back then with no testing almost every rider was using them.
Pain relieving suppositories with Morphine were very common and of course steroids.
I still remember when Ben Johnson got caught at the Olympics. That cost him 10s of millions of dollars and ruined his reputation.
You'd think athletes would learn but the rewards and the fact that their opposition are "probably" using them gives them reason enough to take the risk.
One solution is to make drugs legal in sport. Then it truly would be a level playing field.
Can you imagine the gigantic freaks that would be created if this ever happened?