These players are way beyond any "law of averages." What about them is average? They don't fall into these wins. Sure, sometimes you're lucky and the last man standing, but when was the last time it was anyone BUT one of the big 3? And it is endlessly tiresome that you haters keep having to say that Nadal hasn't defended a title off of clay. As
@brokenshoelace has well-pointed out, it's less important that he didn't defend a specific title than that he's kept a winning momentum, and often doubled a lot of titles, if not consecutively. It's more of a technicality, as some of those misses have been due to injury absence. But some folks can't resist hammering on it. More interesting are the titles he hasn't won, of which there are very few. And you're right to point out that Djokovic raised his level just in time to stop the moment when Rafa should have had some breathing space. But for the guy who's been sandwiched in between Roger and Nole, he's done pretty well for himself. They had some patches without real competition, but Rafa has had none.