I'm sure I'll catch some flak for asking this, perhaps even a good deal, but my logic demands that I do so. Since we all accept the idea of inter-racial, inter-species equality (at least I think we all do, yes?), what exactly is the precise benefit of a more diverse cast specifically over a less diverse one? Since we are fundamentally the same, why does it really matter what arbitrary social distinction based on a wide range of genetic factors one is? Or to put it in some rather more famous words, should we not judge characters "not by the color of their skin, but by the content of their character"?