The best comment in this thread is that music (edited to add: pop music, at least) is an industry, not an artform. I'd also add that today, it is much, much more about image and marketing than artistic talent. In that respect, there are many "helpers" in use, from fake boobs to botox injections to outlandish behavior, for the image of the "artist".
I also like what WIP said. Tecnology is evolving, and auto-tune is a part of that technology. That's not to say I think it's a good thing, but it is what it is.