You think it's just a coach. But there was/is a whole team of people behind Balotelli (or any player). Psychiatrist, coach, players and dozens of other people in a team. I'm pretty sure they all talked to him at some point or another, yet they failed. They failed with many players, Balotelli is just one of them. It's only his fault that he can't change. There's no special cure that Conte would offer, as he heard all those stories before. You can't go to a mental person and tell him to behave normally.