That stance implies you’ll never be satisfied with the answer unless you feel it is of appropriately large doses to justify how much bigger and better pros are than you or any other reference point.
Some are lying. Some are telling the truth. You will be better served by trying to use as little as possible than to assume the difference between you and a pro is simply grams of drugs.
That’s a you problem, not an IFBB pro problem.
As an aside, Rich Piana told everyone how much he used and we’ve got an epidemic of kids taking multiple grams before they even weigh 200lbs. So yeah, the general public has definitely proven they deserve and can manage that knowledge.