My point being twofold:
1) Buying a product without reading the specifications, and then noting that your assumptions were wrong and shouting "Unbelievable!" is silly.
2) There are a lot of RAW formats. If Apple were to support as many as Adobe RAW does today, then Aperture wouldn't be shipping -- it would still have 6 to 12 months of development work to go. So there would be no product. At some point, a feature/functionality choice has to be made. Apple can, by supporting Canon and Nikon RAW files, gets the majority of the pros covered, with just those 2 cameras. The remaining digital SLRs (which is pretty much ALL the other cameras), can come later, if their market shares don't continue to fall.
In an ideal world, sure it would be great if all RAW formats were supported immediately. Unfortunately, there's the practical reality of development time.