One reason for the emphasis on personal guidance is that SGI members do not have a valid Gohonzon. Therefore, they have no way to tap into the guidance and encouragement of the Original Buddha Shakyamuni, Nichiren Daishonin, and the Law. Another reason is to create uniformity in thinking and behavior. Still another reason is that the SGI needs to reinforce the SGI way since not ALL their teachings are found in the authenticated writings let alone the Lotus Sutra and Five Major Writings of Nichiren. Lastly, it is the honey for the unpaid senior leader bees to feel important [power] since they aren't paid for their hard work.