As I said before having Hagoromo's chakra isn't enough, Madara had Hagoromo's chakra, Ashura's body as well as Sage Mode, but he still needed the 9 bijuu in order to awaken Six Path Senjutsu.
Six Path Senjutsu consists of Kaguya's chakra combined with NE which is the equivalent of having the chakra of 9 bijuu combined with NE.
Madara and Naruto both required the 9 bijuu to unlock Six Path Senjutsu because neither of them were born with Kaguya's chakra unlike Hagoromo.
Madara only had Rikudou Chakra, not Rikudou Senjutsu, nor did he get it directly from its source.
The Juubi's CHAKRA
IS explicitly Natural Energy. Everyone who has been a Jin to it and gained the Ten Tails Coffin Seal Mode already had Rikudou Chakra but not the pure Natural Energy of Rikudou Senjutsu (which is completely different in sheer potency and effects).
No, Madara required the Juubi to unlock the Ten Tails Coffin Seal, Naruto was given Hagoromo's Senjutsu
directly and that gave him RSM. THE SAME ****ING CHAKRA THAT ****ING HAGOROMO HAD!
****ing Obito stole Rikudou Senjutsu and was able to form TSBs despite not having any of the Nine Bijuu or the Juubi, why is this? Because he ****ing stole that Chakra from Madara. So think genius what happens when Hagoromo (the first user of RSM before Naruto), gives his Chakra's and power of Senjutsu to said unpredictable Shinobi (Hagoromo split his powers between Naruto and Sasuke, which is Rinnegan and RSM)? Naruto gains ****ing RSM.
Even in the Last Naruto used KCSM without any of the other Tailed Beasts chakra but he was still capable of both touching and destroying the TSBs, and had flight.
Something that can only be done with Rikudou Senjutsu. Adult Naruto has only ever used Rikudou Senjutsu + Kurama's Chakra, this is clearly shown when his cloak never takes on the form of the Nine Tomoe on his back nor the Rinnegan like circle which
everyone with Juubi powers gain.
Heck even Sasuke has Rikudou Senjutsu because A. Both him and Naruto were given the SAME Chakra, the only difference was in the powers they were given, and B. Six Paths Chibaku Tensei can only be used by two individuals who BOTH have Rikudou Senjutsu.
"Six Paths Chibaku Tensei is invoked when two users simultaneously touch their target with the "Yin" and "Yang" seals.It rips a giant chunk of earth up and turns it into a heavenly body, becoming the Prison of Six Paths (六道の獄 Rokudō no Goku) that can capture all things (万物捕, "banbutsuto"). It's a sealing jutsu that can be used by individuals who awaken Six Paths Senjutsu."
Not only that but the obvious fact that Sasuke was shown to be able to touch TSBs should make this obvious. I hope you concede now, after all, if two explicit cases of someone having Six Paths Senjutsu but not having the Juubi should make you understand hopefully that I'm correct.
Rikudou (Six Paths) Senjutsu = Hagoromo's Senjutsu Chakra or Juubi + Rikudou Chakra; and Rikudou Sage Mode = Hagoromo's Sage Mode. Ten Tails Coffin Seal Mode = Rikudou Chakra + Juubi NE Mode.