This doesn't bother me at all. Although I agree that iPods can be effectively sold by anyone, I think that iPhones, iPads and the computer lines need effective sales, marketing and support that most mass-market retailers can't provide.
The reason why Apple started their own retail in the first place was because they were unhappy with the way their products were presented in chains like Circuit City or CompUSA (both now defunct.)
What's the point of Apple spending multi-$millions to open a retail store if a mass market big box store is going to sell the same merchandise? The customer who bought in the big-box store will go to the Apple store for support. This only makes sense in places where Apple doesn't have a store, but the chains won't limit which stores they sell products in so if Apple sells to a chain, it's all or nothing.
While warehouse stores like Costco and B.J.s don't treat their employees as badly as WalMart, they still destroy local businesses and Main Street. I won't shop in any of them. In fact, I try to avoid almost all chain stores, especially big-box stores. That's not always possible, depending upon where one lives, but it's what I aim for. I buy my Apple products (in NYC) either at J&R, Tekserve, B&H or at Apple, the first three being independent, privately held stores.