Cemeteries & prisons are filled with people who thought that very same way.
He’s lived in a velvet trap. Wealth and Hollywood.
Our minds are fantastic organs that need challenges. His mind is wired/rewarded now by drugs. When he is off drugs, his mind has problems. He is infact happier, stimulated under drugs. He is honest and correct. However, like his social Hollywood/wealth trap, he just traded it in for another trap.
He would be very uncomfortable, impatient undertaking any sober challenge, which all of us prosper under even if not materially rewarded.
Further, he is socially trapped as his persona. If he was to be a new Charlie Sheen, most people would consciously or un consciously want to experienced him as the public, clown Charlie Sheen.