Why do people play guitar hero?

its something ive been pondering for a while. i am a real guitarist, and i have also played guitar hero. guitar hero doesn't seem like this life changing mythological change the world creation that everyone raves about, in fact it seemed to me like it was just one overpriced minigame where you match color coded "notes" at the right timing. don't get me wrong, i find it amusing and somewhat fun, but i don't see what its worth to rave so much about. why do people push ons and simulate playing a guitar, when for a little more than the same price, you can buy a real guitar and through the same time learn real songs, and make some talent. i understand it takes talent to play guitar hero, but why waste time with a plastic controller and color coded ons while you might have amazing ability hidden inside of you to play a real instrument?