Because they would solo the beasts using genjutsu and then become super overpowered and not even plot shield could protect the other clans.
And uchiha bodies are suitable for being jinchuriki obito is an example no way fodder zetsu body is stronger than his own body and madaras. The uchiha inherited rokudos genes.
And uchiha bodies are suitable for being jinchuriki obito is an example no way fodder zetsu body is stronger than his own body and madaras. The uchiha inherited rokudos genes.