Wrong. Here we are talking about pure Juubi Chakra, before it was divided into the Nine Bijuus (As it got diluted then). Once you divide something it weakens, but if you have the source it will be very powerful.Dude u can't become Juubi Jin withou Gedo Mezo that was sealed in moon
Kurama already confirmed that Hagorom was juubi jin to Naruto :|
And you really don't need the Gedo Mazou to do that. You can use your own body (Like Naruto) or Susanoo (Like Sasuke) to become a Psuedo Juubi Jin.