My impression at the time is that Bob Chick didn't say exactly that, more like the spirit of the saying. And that was the funny part, constantly throwing it at him knowing he never said it exactly.
It's funny what Arnold said above, "The story quoted Arnold Schwarzenegger, who said that if you build your body with drugs, you'll have nothing left when you stop using them." Exactly, Arnold showed that perfectly, he had nothing without the drugs. But he somehow claimed they were just a finishing touch for him. No, they built his whole body (of course along with the necessary training).