If you look at CaptureOne you can see how easy it is to edit a raw image. Most of the time it looks like the camera jpeg without having to tune anything. But then you have the options to go in depth.
Sometimes I have a photo session where everything is to my liking, just a bit of exposure and crop. Other times I shoot in night clubs with no flash and I have multiple layers of masks for a single photo.
A UI with decent defaults goes a long way into making a complex app easy to use.
