They Don't Know What's Beautiful
After watching the video below, I try to imagine the "Piano Guys" explaining what they wanted to do to a piano "purist" or "traditionalist." I'm guessing they would have been poo-pooed. (Pardon the fancy musical terminology.) The purist would say, "a piano isn't supposed to be played that way." The traditionalist would likely say, "That's not the way we play it here." Both might go as far as saying, "If you are going to get all weird, then you need to go do it elsewhere." .. and in the process, they'd forfeit the chance to hear something as innovative, creative, and altogether amazing as the following rendition of this song.
After all, those that don't innovate and push the boundaries seldom "know what's beautiful."