Board Thread:Versus Debates/@comment-5936871-20160126112547/@comment-3965545-20160212000814

Nagato was not linked to the statue in the manner of using its chakra, he was linked that way in order to better seal the tb's in it since Obito didn't teach him the sealing tech that himself and Madara used. The whole plan from the beginning was to use Nagato that way.. therefor they never taught Nagato the other Rinnegan techs such as Tengai Shinsei or Limbo(Madara never taught Obito them either) so the only way Nagato himself knew to seal the beasts was to connect with the statue.