One theory I saw awhile back is that the Force is constantly trying to bring the galaxy back into balance, such that if ever the Light prevails and the galaxy is ruled by peace and harmony, dark Force users will emerge and gather power to oppose it, and vice versa.
Which (a) fits perfectly with the history of the Star Wars universe, and (b) is about the most depressing thing ever, as it means that the galaxy is doomed to a never-ending cycle of war.
That does seem to be Baylan's viewpoint, in which case I'm right there with his desire to break the cycle, though I doubt his chances of actually doing so.