You just aren't nearly far enough out on the fringes to see it, that's all.
You seem to have missed my point. My music collection is chock full of "fringe" artists. I'm not saying I want pop music to evolve because all I listen to is pop and I want it to change. I'm saying that I want pop music to evolve so that the record companies will give more marketing muscle to 2nd and 3rd-tier artists who don't get a chance when they're looking for the next Britney Moore or Jessica Aguilera. Then it'll be much easier to find good music instead of having to hunt it down like I do today. There have been times recently when the most popular music styles of the time were actually listenable and produced music that, to me, sounded good. Those times are gone.