You have a flawed understanding of the issue.
1. LA was not just a PEDs user, he sued people, he ruined careers, he kept money that should have gone to charity.
2. LA rode a bicycle among other PEDs users. He did not use his PEDs to hit people.
GSP has been a stand up guy, he seems to be honest and has integrity. Do you think he'd be stepping down if he was using PEDs? Possibly.
IF GSP used PEDs to train, and tapered to fight, I suppose I could forgive him, but again, when you taper is when the effects are most pronounced.
I don't think fighters should use strength enhancement PEDs. I don't have a problem with them using limited recovery PEDs.
Ban hGH, Test, anabolic steroids and EPO. One use and you're suspended for a year. Two and it's two years. Three and you're out.
Allow cortisone, IGF-1 and other recovery PEDs (but not hGH).
So it depends on what GSP might have used for me to critize him.