Why we (as Nichiren) are disciples of Shakyamuni Buddha and not Daisaku Ikeda, the High Priest of Nichiren Shoshu, nor the Nichiren Shu priests?

"But now that it has become apparent that Shakyamuni Buddha attained enlightenment countless kalpas ago, then the bodhisattvas Sunlight and Moonlight, who attend the Thus Come One Medicine Master of the eastern region, and the bodhisattvas Perceiver of the World’s Sounds and Great Power, who attend the Thus Come One Amida of the western region, along with the disciples of all the Buddhas of the worlds of the ten directions, and the great bodhisattvas who are disciples of the Thus Come One Mahāvairochana as they are shown in the Mahāvairochana and Diamond Crown sutras—all of these beings are disciples of Shakyamuni Buddha, the lord of teachings. Since the various Buddhas themselves are emanations of the Thus Come One Shakyamuni, it goes without saying that their disciples must be disciples of Shakyamuni. And of course the various deities of the sun, moon, and stars, who have dwelt in this world since the beginning of the kalpa of continuance, must likewise be disciples of Shakyamuni Buddha."