Board Thread:Theories and Speculation/@comment-45444155-20200507075527/@comment-6769189-20200512094930

Because 6P Senjutsu gives the user understanding of all things. With that understanding the user manipulates TSB, but the TSB themselves are just chakra, not Senjutsu chakra.

Also Sasuke didnt say nature energy is effective against nature energy. Naruto theorized it and admitted that he didnt really know what he was talking about in that same panel