It isn't. It's something that inspires him and something I think he uses to spur him on. What's wrong with that? All people want to do these days is take stuff at face value and use it against people. Never been such a judgy era than this."My goals are beyond your understanding" is a fairly full of yourself statement id say.
Nothing wrong with confidence and a bit of arrogance, most top sportsmen have those qualities, as i said you just need to back it up in the real world, and i hope he does.