Board Thread:Naruto Discussions/@comment-34700383-20180829185752/@comment-30323490-20180902150326

Hamura, Hagoromo and Asura were users of SP Senjutsu and they didn't have the ten-tails. Hagoromo and Hamura were fighting Kaguya with SP Senjutsu, and Kaguya herself was the ten-tails at the time.

But Naruto did obtain SP Senjutsu because of the 9 bijuu chakras.SPSM was because of Hagoromo.