Quoted from spfxted:even Arnie said he would have taken steroids even if he knew how bad they were
Arnold took a lot of steroids...and he has admitted to taking them...they ALL did (do).
Also...steroids in of themselves are not bad for you...in fact they can be very therapeutic. Only abusing steroids is bad for you (which many bodybuilders do).
It's possible to take steroids to the point of getting beyond your genetics (athletically) and still have no lasting ill effects. It's also really easy and common for athletes to think "if a little is good a lot must be better".