Do you really think so? I see a lot of UFC/MMA fighters that have huge holes in parts of their game. Maybe they would do a lot better if it went to the ground, dunno. To me, many UFC fighters kick and punch poorly, but some are just so devastating with their shots even if still not great boxers. I realize also most MA "masters" probably are not great boxers either. I also doubt we could find that many MA "masters" that have the brutal physical profile of many MMA fighters. While the pure Martial Arts "master" could probably cream 3 punks that jump out of the bushes, maybe most UFC professionals are just too physical one on one. Hard for me to say because I don't know what many pure Martial Artists.MMA champions are among the greatest atheletes in the world and could rival if not dominate any traditional martial arts 'master' in my humble opinion.
It would be interesting to see a real good boxer cross train and fight MMA to see if outclassing someone by a good margin in boxing makes for a tough A game.