And of course we can't believe anyone anymore, because every athlete that has ever been proved to have taken 'roids has lied about it. Everyone. And to prove someone did 'roids is incredibly difficult.
So the government is going with the next best thing: perjury. One of Hugh Lawrie's quotes on the show House is "Everyone lies." And every patient who comes to him in hopes of getting healed lies. I'm not sure these athletes are any different.
Even though many people have no problem with regularly lying, or 'need' based lying, probably all understand that you just don't lie to the Feds. The buck (or puck if you're a hockey fan) has to stop somewhere. People realize that there has to be some standard where truth can be affirmed. That's just part of humanity being made in the image of God: "created in righteousness, holiness, and truth (WCF)."
Regardless how much the truth is suppressed (Romans 1), people, regardless of faith, want to have the comfort that there is some standard. Unfortunately God's Word is not that standard for most. But I think this concern for the truth has its root in a humanity created in God's image.