He has been lucky in that respect, but a lot of people do, and they still don't turn out like that, so there probably is more to it, we just don't know what.
Personally, after seeing the extent to which Phil just does not learn from things even other dumb people are given pause by, I'm convinced that his behavior is far more from being spoiled than even from stupidity. Everywhere I look with him, I see him having to have it both ways, constantly, refusing to make any sacrifices, no matter what it is that he clearly desires. Just look at his clout-chasing on Twitter. He obviously needs to change tactics, or give up, but he's not doing either one because he doesn't want to, and anything he refuses to do, that should NEVER cost him his goal. Phil is entitled to getting everything he wants, every time, no matter how contradictory, inappropriate, or out of touch with reality it is.
Something else happened besides being handed all kinds of toys as a child, in order to turn him into THAT.