If not really a manufacturers problem if people don't take care of their belongings, especially when they are expensive. Can you have a delicate glass product and treat it as if it were made of steel? No, right?
Well, in the same way you can't treat your phones and iPads as if they were a made of plastic, or iron. Materials have limitations and no one can do anything about that. The same with the electronics part, not only the screens.
Don't blame Apple if you let your iPhone fall. Try to be more careful, instead. :) Wouldn't that be something you would tell a child?