It's all mental, of course. There was never any luck, never any favorable bounces that used to cancel out bad breaks. In golf there are only bounces. Fair or unfair plays no role. You can tell yourself this an infinite number of times, but it's hard to believe it. It's embedded.
I'd love to tell you he'll recapture the magic he had before the fall, that he won't stand over a shot w/ 50 thoughts in his brain, all of them at war. But this I don't know for certain. Golf is cruel. Sometimes the unicycle crashes into a branch. And never feels the same again.