Dude, all I'll say is this: I loved music, and these games just made me love it even more! It even made me realize something... I said to myself ''Wow, this is pointless and it's never going to make me feel accomplished.'' And guess what? I started to play the real guitar, and I'm getting quite good at it! I can even play some of the beats of some GH songs, like Mother, Woman, etc.
So no thanks, GH (and rhythm games in general) can stay here as long as they want, because people need to learn about music, and it's a very good way to make people listen to various styles of it.