Dude, you're so off. It's not what you think at all.
First of all, they ain't coming here. And if they were, they wouldn't be laughing at the guy who takes 20 mgs of dbol and 400 grams of test. They'd be laughing at the guy who takes 50 mgs of dbol and 100 grams of test and 400 grams of deca and 500 grams of EQ.
I can't mention names but I know pros who take just test and primo and that's the end of it. They don't have the best doctors. They have a friend who hooks them up.
You ask: "If it's not a science, what is it? " It's called elite athlete talent bro. Genetics, meets work ethic meets response to drugs. One percent of the population has it at a level that makes them the top one percent.