Your panel doesn't really prove anything.
Hagoromo already stated what happened when they fought the Juubi. They
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inside of himself. So that is what happened until proven otherwise. If what you claim went down really happened, then Hagoromo never would have became the Juubi's Jinchuuriki, and that is also a proven fact in this manga, unless you are denying that too? Even though Hagoromo is being depicted with the Gudo Dama, a Juubi Jin's ability. This is the factual and canonical order of things.
1. Hagoromo and Hamura fight and defeat Juubi.
2. They seal it inside Hagoromo.
3. Hagoromo grows old, and extracts the Juubi and divides it into the 9 Bijuu.
4. He's left weakened because of the Juubi's removal, so nothing happens here.
5. Once he's regained his strength, he removes the Gedo from his body and seals it using Chibaku Tensei.
6. Later he dies.