You could well be right about conditions today - things have changed for the better in terms of PED testing in much of the world; Russia and China are today exceptions. And if what you say is true, then my hat's off to US Wrestling.
However Satiev and Karelin were active in the 90's and early 2000's, before USADA was testing American wrestlers (or anyone else), and to assume that those two were doping but Americans who also never tested positive weren't strikes me as fairly partisan.
Its possible that unlike American track (which was as heavily invested in PED's as Russia or China at the end of the 20th century, tho based on private enterprise rather than gov't sponsorship), American wrestling never had anyone using PED's in the 90's/early 2000's, but other countries who similarly never tested positive were using. But possible is a long way from proven, or even likely. I note that according to Wiki, in that time period only one wrestler tested positive in the Olympics, and he was from Mongolia. That doesn't seem like much of a basis to suggest the Russians were using but the Americans weren't.
Part of my suspicion probably comes from being a Canadian, and remembering the (deservedly) huge moral outrage against Ben Johnson, and then learning later on how many American track athletes, including Lewis, who was one of his most outspoken critics, were using themselves. (For that matter, even in this Olympics two of the sprinters on America's 4*100m relay team had been suspended in the past for using). It really seems that everyone thinks their athletes are clean but the competitors are cheating; perhaps that's natural, but it doesn't mean anyone has to take such pronouncements as gospel.
