I don't think Leon gave that too him intentionally. That moment may end up derailing his opportunity to a title shot.
He's lucky Diaz has mediocre fight IQ. If Diaz would have swarmed him instead of pointing and showboating, he might have finished his ass. Of course, that's Nate's own fault and he can only blame himself. He doesn't seem to care though.
Note: not hating on Diaz at all. That was just a silly way to handle a potential fight winning situation. Who knows, maybe he's expecting Porier to decapitate Conor again and didn't want to win because then it would be hard to justify another fight with Conor. Those two would still pull in a million buys for a rematch easily even with no divisional stakes on the line. Hell, they can pretend it's an eliminator for a shot at the BMF belt again or some dumb shit