OK, but who's being cheated?
The cheating argument only really holds up to comparing people across years or eras. People are only outraged about MLB players using HGH because it gave them advantages over guys like Babe Ruth and others who didn't have such benefits of modern science, nutrition and medicine. If everybody within a certain era has access to the same drugs and has the opportunity, equally, to partake in them (which would occur if it was simply legalized in sports), then there's no cheating argument possible, because there's no unfair advantage to anybody. The unfair advantage is created by a) rules prohibiting its usage, thus making the risk/reward lopsided and b) fans having an oddly weird obsession with comparing athletes across eras, which never made any sense.
In particular, I find the whole "cheating" argument laughably bad when it comes to the NFL. Fans encourage and cheer on angry, dangerous, sometimes maniac players who are the size of mac trucks. We like vicious hitting, we like watching human beings inflict severe bodily harm on others, but somehow we've conjured up this ignorant line of thinking, where there's a "moral line" being crossed by using PEDs to recover from injury or increase performance. Never quite passed the smell test for me.
In the end, I don't think anybody honestly cares about PED usage in the NFL. I go back a decade or so again to Brian Cushing. He wins defensive rookie of the year in 2009, after a dominant season. Everybody and their mother looked at him and thought he was using PED's. Sure enough, 5 months later, he tests positive for hCG, and gets a four game suspension. The Associated Press, who gives the reward, subsequently allowed their voters to re-cast their ballots for DROY, knowing that Cushing likely wasn't clean while he won the award. He was voted DROY again, even after the fact. And this is from the AP, an organization that was notoriously tough on PED users in MLB and others sports in the past, and includes voters who vote for the MLB HOF.
The hypocrisy there isn't something that should be easily ignored.
its those non-cheating fellow athletes that are being cheated - nothing to do with stuff across eras
it's not a moral thing either - it's about competitive advantages that are unfairly created