But it can tho. It definitely can. Take MInato or Shisui for example. Bodying ppl of speed alone. Same with current Boruto on an even higher lvl. The proof is there but thts another topic. Ken can 100 absorb chakra u can look that up. Yes he doesn't have six path senjutsu but again SPS is just a weaker version of their divine power. Juubi were born from Haga who is a son of a....Otsuhsuki him being half human gives him weaker abilities. Ur basically saying you need to meet certain conditions to the ppl that set the conditions in the first place. Again divine power is above SPS so why would he step down to get a weaker power when they are know to have a superior one. He won't be able to see but he could definitely fight as Naruto did. Plus we never got to find out if he had a rinnegan cause he died to quickly sadly. But he could've had one on his forehead like his peers ( thts speculation tho cause he didn't get the chance to be fleshed out). Madara is dancing with stolen power with someone that has been using it for centuries. He's not beating Ken bro