Those who tend to not flinch when presenting their mask to the public are either very good actors or borderline psychopaths, maybe both!
As we know, throwing the iron around can manifest into extreme insecurity and narcissism, not to mention the schmoealistic appeal! Plus, O'Hearn is aging and needs to preserve his identity. As another poster pointed out, he has nothing to gain from revealing the obvious.
I think it starts out by being coy and evasive on the issue, but the more you have to narcissistically post on Instagram, Facebook, Twitter, etc., the deeper you get pushed into it until you just have to flat out lie all the time about it. And there's nowhere to go from there and no way to reel it back.
To me though, this is the fundamental question of modern bodybuilding now that the equation is:
Big guy = juice = anyone can do that if they are willing.
When I started the equation was/seemed:
Big guy = works hard in gym = that's not something everyone is tough enough to achieve.