Board Thread:Naruto Discussions/@comment-4688597-20140828033453/@comment-24531362-20140828205634

Exactly. The point I am making is that the beasts were created (without senjutsu), the statue was created (without senjustu), and natural energy was released into the world. This would explain why those whom Hagoromo gave chakra didn't all have senjutsu chakra, as the requisite natural energy was all contained within Hagoromo at the time.