And have your whisks rubbed away the anodized finish? Yes, anodizing protects the aluminum from oxidation, but it also results in a much harder surface than bare aluminum. From Wikipedia:
Anodic films are generally much stronger and more adherent than most types of paint and metal plating, but also more brittle.
A bit more research shows that there are multiple chemical processes for anodizing, and some result in harder surfaces than others. Type III (hard coat) anodizing requires sulfuric acid in a more complex process. The thickness of the anodized layer also factors into wear resistance. It would appear HTC is using about as thin a layer as is possible, and not using a hard anodizing process. I would guess your cookware, and my levers, are hard-anodized.
Regardless, I'd be pretty disappointed if my supposedly rugged, "all-metal" phone showed surface wear within a matter of weeks. Heck, a painted surface will hold up better than that.