But if you drop yours face down you'll end up with a shattered phone screen that requires repair.
If I drop mine face down I'll end up with a shattered screen PROTECTOR...my screen will be fine.
That is why people are buying them. That is why they are worth the money.
But to each his/her own.
Valid point that I won't dispute. I had a Mophie Battery pack case on my iP4 which served a better purpose, it saved my phone from a drop and 3 bounces on the concrete AND works as a battery back up. With a screen protector, I suffered no scratches and the rubberized inside of the case prevented any impact cracks.
Definitely not arguing with you, just sayin there are other ways too.