Common sense?

Have you played sports before? Even at the high school level teenagers are pumping their body full of steriods. I saw them do it myself, I've heard the stories from my friends who played rugby. Just look at top high school rugby or american football teams physiques, or at the cardio capacity of teenage track and field athletes. You really think that level is attainable without performance enhancing drugs, at such a widespread level? You really think that stops once these athletes become adults? How about the fact that all of Usain Bolt's competition got caught doping? You can't be this gullible.

https://www.cbsnews.com/chicago/news/bernstein-usain-bolt-is-probably-doping-and-you-know-it/

Russia's sin here was official state involvement, not doping. As long as you pass the drug tests, nothing matters. Remember that Lance Armstrong never failed a drug test. Does that mean he's a clean athlete? Of course not, and neither was any of his competition.