Board Thread:General Discussion/@comment-26830922-20150919143533/@comment-31283382-20161027000257

Well, It could be due to the fact that while a Shinigami is limited by his overall power, the capabilities of Mod-Souls are potentially limitless. I can imagine the Central 46 as a flock of paranoid, power-drunk geezers, who were afraid that Mod-Souls could be used to overthrow them.