I think everyone is getting over the top with this. One defining feature of Junior is his mentality, he lives to fight, the result of this is that every time he steps in the cage his confidence is through the roof.
In a sport where there are so many ways to win and lose, his hands are yet to fail him in the top organization. There's more to his game than just boxing, or he wouldn't be where he is, but that particular art is his love and best weapon.
JDS thinks he can defeat any man in combat and by the time he steps in the Octagon he KNOWS it 100%. That's why he's Champ and probably will be for a while.