The irony is that what happened to your screen protector is exactly what happens to hard glass.
If a phone company made the glass hard enough to be impervious to most scratches, it would do precisely that - shatter and crack at the slightest provocation.
The people you at Apple you want to read your comments do not read these forums; I'm not sure why so many seem so adamant about not sending comments where they will read them and insist on posting here.
Once more, post your comments to Apple here:
Feedback - iPhone - Apple
If you don't want to use a screen protector, you don't have to, but odds are your screen will scratch.
If you don't wash and wax your car, the paint will fail, and guess what your auto manufacturer will do in that case - absolutely nothing.
Oh, and users here (that includes you) don't get points for "defending Apple," we get points for answering users' questions and solving their issues.
Simply posting gains us nothing.