No, I do not know a single person with shiny corners. Maybe we all take better care of our devices, but after 5 months my device doesn't even have a single knick in the bezel.
Your car analogy is horrible. But if you have damage on your bumper and your radiator breaks, they do not have to honor your warranty because you hit something that may or may not have damaged the radiator.
Additionally, here is what voids the iPhone's Warranty:
"This Warranty does not apply: (a) to consumable parts, such as batteries or protective coatings that are designed to diminish over time, unless failure has occurred due to a defect in materials or workmanship; (b) to cosmetic damage, including but not limited to scratches, dents and broken plastic on ports; (c) to damage caused by use with another product; (d) to damage caused by accident, abuse, misuse, liquid contact, fire, earthquake or other external cause; (e) to damage caused by operating the Apple Product outside Apples published guidelines; (f) to damage caused by service (including upgrades and expansions) performed by anyone who is not a representative of Apple or an Apple Authorized Service Provider (AASP); (g) to an Apple Product that has been modified to alter functionality or capability without the written permission of Apple; (h) to defects caused by normal wear and tear or otherwise due to the normal aging of the Apple Product, or (i) if any serial number has been removed or defaced from the Apple Product."
It is clearly stated that damages to the device void all warranty.
