Why does it seem like the story is basically a self-fulfilling prophecy? The whole point was that the students were shown Darkness would win in the end, and they tried to stop it, but in so doing, they end up going different routes and fighting each other, which basically sounds like the story from Kingdom Hearts, where they say "people became greedy and started to covet the light". You'd think these guys would have thought about this just a little more.
BS Philosophy: There is a story in everything, or we wouldn't have history (first thing that came off the top of my head)