John doesn't have the best structure, but he has always had a great chest and lats that insert into his knee caps (dennis wolf is pounding the keyboard in anger as I type this). This along with 35 years of serious training, his current physique is believable.
There's a 52 year old black guy named Mike who lifts at my gym. He did 4 shows in the 70's and 80's, won every single show but couldn't ever afford to go to nationals and go pro. The guy has been a lifetime natty. Dirt poor, blue collar worker, still eats egg whites 3x a day because it's all he can afford, doesn't know jack shit about supplements or drugs,(not that he could afford them anyway) but still trains every day, holding a crazy amount of chiseled, lean muscle at age 52. He's been doing this since he was 15. And he looks about stage ready all the time.
People say its "all drugs", but if you have some GOOD genetics and a decent work ethic you can achieve this. If you have shit genetics, I know some elf's that seem to have some lucky charms and magic potions they can sell you at their website.