"Never support the quality of RAW?"
It's funny that you berated that other guy for not knowing what a RAW file is when it seems you're a little fuzzy on the concept yourself. Perhaps you should Google it too. Lens quality has nothing to do with whether its useful or not.
If I could have access to the original camera data from an iPhone I would have a greater ability to color correct the photos. When it gets compressed down to a JPEG you lose some of that ability. It would be nice to get a crack at that data before it gets compressed.
Color correcting has nothing to do with the quality of the lens. You can get any color through the glass, no matter how "tiny" it is, so it would nice to keep all those colors.
I don't think Apple should ever make RAW files a basic feature in their camera app. Most people don't need it. But yeah, it'd be cool if they let developers have a shot at it so that someone could come out with a 'RAW camera app' in the app store. That would be a fun app for those who want it.