Members on the Base have had this argument a lot, I thought we were going back to that. Those seals were only given to Naruto and Sasuke so that they could perform the same Six Paths: Chibaku Tensei as Hagoromo, otherwise they'd have no real way of sealing Kaguya (or Madara). Sasuke attempting to strike Kaguya with base Chidori proves he has some amount of Senjutsu chakra naturally in his attacks, not to mention his comment at Naruto after he lost the seal: "I can feel it... all that Nature Energy", when these two scans [
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] say that without having it yourself/having Senjutsu you cannot sense it. And Sasuke did. After he lost the seal.