Board Thread:Theories and Speculation/@comment-26636534-20180703115315/@comment-1512913-20180703140617

The reason why there was no distinction, is because Earth's God Tree is no more, having become one with Kaguya as the Ten-Tails. I think Kaguya merging with the god tree was more of a permanent process. I don't think you can separate them. Kaguya isn't the God Tree's/Ten-Tails' jinchuuriki, she is the Ten-Tails and God Tree is simply no more.

The reason why a human host with Rinnegan was needed to revive Kaguya, was because she was sealed inside of the Moon as the Demonic Statue and only a Rinnegan user can summon the Demonic Statue for whatever reason, or rather just someone with Hagoromo's chakra specifically, since he was the one who sealed her and was the Ten-Tails' jinchuuriki.