Joe, what you're saying works, to some extent, when talking about metahumans. Examples of 'real' good and 'real' evil are rare, because those are extremes on the bell curve, but they do exist, and most people are in the shades of grey. However, your 'grey and greyer' analogy forcibly cuts off the two parts that make that grey possible, the white and the black. It is a spectrum on a bell curve, and the vast majority of creatures in this world are in between. But that bell curve only applies to metahumans, and other creatures native to this plane. The further you go from the material plane, the more likely that the bell curve will be shaped differently, with different values. Shedim are creatures of a very different plane, one most likely far closer to that of the Enemy than others we've seen. These creatures seek out life and extinguish it, because they hate life itself. Maybe you could find a 'good' Shedim, but you've got a better chance of finding a Drow Paladin in D&D settings, back before a certain dual-wielding ranger became popular. Your arguments aren't bad, for talking about humans, elves, even dragons. But when talking about residents of the deep metaplanes, they are basically a whitewash, ignoring the truths as they have been specifically laid out in the setting canon. You may like it to be as such, and in your home game, you are free to house rule things to your heart's content, but we're talking about the ACTUAL setting, and the ACTUAL way things are in the SR universe.