Those aren't scratches. They're scuffs. They give the metal a nice, paterned look, similar to
brushed aluminum.
Many things are made from similar materials as it's a nice look that feels "real" as opposed to glossy, cartoony perfection.
The iPhone doesn't come that way, but lets the process occur naturally. So yes, your phone looks different the first month than it will the rest of its life, but the fact is that it's getting MORE beautiful with time as the scuffs improve its apperance.
That's the problem with computer people. You all live your life with exact pixels and bright icons and the straight lines of an OS. Everything's a 1 or a 0 and that's that. I think many of us have lost the ability to appreciate the beauty of the real world and the objects that reside in it. Scuffed, brushed, or grained metals are all beautiful and full of character. It's sad that these atributes are now seen as "flaws."
