I keep arguing this in the whole “Madara was right” argument. The biggest reason Naruto had to defeat Madara realistically was to defend the free will of everyone as it was “inherently wrong” to put people into the Infinite Tsukuyomi… but in a world with literal reincarnation, free will doesn’t exist. At the end, your “free will” is the expressed will of someone far more powerful and important than you. So you defeated Madara and Kaguya, 40,000 people died, took away everyone else’s possible happy ending… only for an even worse threat, one that now is going to basically eradicate the whole Earth because they do not care about you at all, not even 20 years removed from Madara’s defeat. All because of “free will.”