MLB "witchhunt"

Can someone tell me what anyone hopes to accomplish by finger pointing toward baseball players who used "steroids"? When your career depends upon you performing at an absolute peak, you're probably going to do just about whatever it takes to help you attain this. Many of these substances were, at the time, legal and misunderstood. So now we're going to destroy the game that so many of us grew up loving because some people want to finger point? Apparently the world doesn't have bigger problems? I tire of this. What are we doing about the professional athletes who exhibit frivilous behavior and end up killing people, animals, etc. As far as I can tell, only one has even received close to what he deserves for his actions. In essence, people guilty of far worse things are getting off with a slap on the wrist and the others, who hurt no one but themselves, if even that, are being ostracized and taken to court? It just doesn't make sense to me.