If I was studying the force, I would try and study both good and dark side of the force. Of course when I study the dark side I would not go crazy and kill a bunch of kids (like some mad f*cks I could mention. ) So I would have been impressed to hear the Chancellor's speech on the dark side. I would do this for strategy reasons. It is always good to understand what the opposition is thinking.
If you know the enemy and know yourself, you need not fear the result of a hundred battles. If you know yourself but not the enemy, for every victory gained you will also suffer a defeat. If you know neither the enemy nor yourself, you will succumb in every battle.”
― Sun Tzu, The Art of War
Of course this may be a bit deep for George Lucas.