With these stories finally told, we can at last answer the primary question: so what?
Consider it a parable. The world of video games, as it stands today, is a very warped and bizarre place that is slowly but surely forming the black hole center of a cultural quasar. Rather than engage with the world around it on the terms of reality, it chooses instead to create an entire supporting psuedo-culture, either by bending existing media to its will or making new abominations to further extol its own virtues. "Hardcore" players of plastic instrument games are generally attracted to metal because of its difficulty as gem sequences, and clamor for video game-related novelty songs because their subject matter reinforces their lifestyle. It's why people remember "Jordan" by Buckethead from Guitar Hero II, "Through the Fire and the Flames" by DragonForce from III, and why when given the keys to a content pipeline in Rock Band there came a surge of Jonathan Coulton and Evile. To be fair, though, those are also some of the artists that sold the best, so they at least deserve credit for knowing their audience (themselves).
"Note Shuffle", i.e. "Just Put The Gems Wherever"