The way I understand it he went from the wrong side of the tracks to multi-millionaire almost overnight. And at what, 13 yo? Child stars have been notorious for acting out and/or dying as they grow into adults. How many people people do you suppose have questioned his activities since he became 18?
And yes, I do think it’s true of other stars as well. The difference is that actors are under constant direction, or they don’t work, and most stars are older and work harder for success.. Look at the hideous mess Micheal Jackson became, and he had a large family ‘in the business’. I find Miley Cirrus’s behavior much more surprising, as she was raised in the business. Billy Ray did a really crappy job of raising that young woman.