Two Very Very Important Questions

The house we rented in Vermont last week had Playstation 3 and Rock Band set-up in the basement, and after many hours of playing (and I must say that I am a pretty good Rock Band guitarist and drummer) two questions come to mind . . . one of which the internet answered: Question #1 . . . Are actual rock stars good at Rock Band? -- and there are loads of YouTube videos proving that actual rock stars usually CANNOT play their own songs on Rock Band . . . Question #2 is . . . Why don't they have a Jazz Band module for Rock Band? and while I love jazz, Bruce McCulloch answered that question long ago: if you like jazz, then you, sir, are my nemesis!