Carl, the point is that products like Adobe Bridge are based on technologies that have been in the marketplace for a long time. So, I, for one, expect Bridge to support a large number of RAW formats. As pointed out in this thread, Aperture does not, itself, support file formats. That is left to the OS. Adobe, on the other hand builds its support directly into its programs, not relying on the OS. Also, Adobe doesn't develop and sell operating systems.
So, why doesn't Apple do the same thing with Aperture? Because, from a development standpoint why reinvent the wheel? When support for your RAW format is added to OS X, it will be added to Aperture.
Also, Apple published its list of specifically supported RAW formats so that anyone considering Aperture would not buy the program and then find out that they can't use it with their camera files. To buy any program without first reviewing the list of requirements and supported files is foolish. To assume that just because you have a Pro camera means that your camera file format is automatically supported, even if it is not on the list, is also foolish.
There are a number of different manufacturer RAW formats on the market (they even vary by camera), some more commercially viable than others. I am sure that Apple will add additional Pro support in future versions of OS X. And if linear DNG support is added, things will get better for a lot of people. But, that's Apple's call. So, if you haven't already done so, I suggest you submit a request to Apple.
Jeff Weinberg