If you get a chance watch the great new French film "The Chorus". The line that jumps out is what the teacher says about the talented pupil as he tries to persuade the mother to send him to a music school. She asks what will happen then and he says;
"He will be what he has to be."
That's the artistic temperament, You don't dabble, you don't play at...you "be what you have to be" and take the consequences. For some, these are too great. They think they are drivers but they end up being driven, and that's when control can be lost. The blessed are those who can make the journey and stay in control. I have friends who have succeeded in that, and I have lost others who failed.
I have to say that those I've known who get more success than most also have more problems controlling their journey. The moon is a better target than the stars.