SGI Mentor-disciple doctrine is a shallow pitiful doctrine lacking the Three Proofs.*

"T’ien-t’ai asserted, 'That which has a profound doctrine and accords with the sutras is to be written down and made available. But put no faith in anything that in word or meaning fails to do so.' He also said, 'All assertions that lack scriptural proof are to be branded as false.'" (Questions and Answers on Embracing the Lotus Sutra)

*Three Proofs: Scriptural, Theoretical, and Actual