In organized sports, the U.S. does much more to try to prevent doping and even prevents top athletes from competing at the Olympics. The U.S. does not have a government sponsored and organized effort to dope athletes so that they can win at the Olympics, World Championships, etc. Russia does. (That's why their athletes weren't competing under the Russian flag at the Olympics, which was a slap on the wrist.) Anyone with half a brain can see that this is a HUGE difference.So it's better that US athletes just dope in their gyms. There are a lot of performance enhancing drugs being used in the United States.
What happens in gyms has absolutely nothing to do with this issue.