I mean how can they give advice to build muscle when they only did it on the juice anyway.
Most of the information that I know about training correctly has been learnt from steriod users, some of them really know there stuff. Reason
1) these are the people who stood out to me when I first started
2) a lot of them are passionate about learning the nuances of training, eating, etc.
Of course the same thing can be said about non drug users right.
You do know that there are Pros who compete in natural feds right? Also you have Jeff Willet and Kai Green who claim natural statis (I say claim because I'm not a mind reader) you can learn a lot from these cats.