Yes, we call that the genetics factor. Plus, Pearl was not always a vegetarian and even after becoming one, he still drank milk and ate eggs I believe. Where did you read that Goldberg was a vegetarian?
Well Doug Hepburn definitely didn’t use drugs, that’s why he felt he was “naturally” stronger than Paul Anderson because Anderson would not come forward and say he has never used drugs on a polygraph, and I’ve never heard that Steve Reeves was juicing in the 1940’s, but I suppose he may have been.
I saw Goldberg’s name on a list of celebrity vegetarians. I can’t confirm it obviously, but I know he’s contributed reciptes to a PETA cook book, and I’ve also seen articles referring to him as an animal rights activist.
Remember, most of the classic protein powders in the old days were soy-based, and guys still got big and strong.