As I mentioned, Penn and Teller did a pretty good debunking on Martial Arts, and they didn't stop with the mystical energy stuff, they also focused on the whole culture of selling 'deadly warrior secrets' and the hype that surrounds the business end.
In order to separate people from more of their money, the levels of deception employed rival any faith healer that Randi ever debunked. Teacher worship, lineage games, origination myths, secret manuals, potions, retention exercises... it is the stuff of carnies, and it goes back centuries.
So when I hear how *your* grandmaster (general 'you') is the only true grandmaster in the world, and nothing at all like the thousands of other rival grandmasters, other folks may be willing to suspend disbelief, empty the teacup that is their mind, and 'eat bitter'.
And as far as I can see, MMA is simply the televangelist branch of that particular faith based discipline with trophies and title matches replacing the trappings of the temple.
I don't know, I guess I'm just too... skeptical or something to make a good grasshopper.