Board Thread:Theories and Speculation/@comment-6769189-20200705100921

Hagoromo gave Naruto SPSM because he only had the Tailed Beasts chakra, which by itself is not enough to induce a Six Paths Senjutsu state. Placing all of their chakra into one vessal wouldnt recreate the Juubi's chakra. They need to be placed in the Gedo Mazo for that.

For starters, we know that Six Paths Senjutsu can be performed without the Juubi or Bijuu chakra since Hagoromo and Hamura used it to seal the Juubi in the first place.

Secondly, Obito/Madara always made it a point to seal the Bijuu in the Mazo to awaken the Juubi and then become the TTJ.

And finally, Sasuke poured all their chakra into his Susanoo and into Indra's Arrow but neither one is Six Paths Senjutsu and Sasuke is not a Six Paths Senjutsu user 