Maybe I missed it, but I don't recall Fred Savage (The Wonder Years) or Neil Patrick Harris (Doogie Houser M.D.) getting into any huge trouble transitioning from teen star to adult actor.
Ron Howard also credited his parents for making sure both he and his brother Clint had normal childhoods even if they were child actors. I realize that was another time, but there are plenty of examples going back as far as the 1920s and 1930s of childhood stars falling apart as they tried to go onto adult work. It's not like acting out is new.
Is it probably hard to avoid those traps? Yes, I'm sure it is. But it's possible.