Board Thread:Theories and Speculation/@comment-30168130-20170319171713/@comment-734582-20170327121527

UltimaDude wrote: Need me to go on? So, like I said, the heart is not the primary source of chakra I said primary. It's not that the rest of the body doesn't generate chakra. The heart is simply the most important.

Eight Gates doesn't start at the heart because it would kill you. It starts at the brain, AKA the thing you have most control over.

Kakuzu could've stolen the blood and flesh of his opponents afterwards, but his jutsu makes specific use of Hearts, suggesting a greater significance.

Why would Sasori become a puppet when it would absolutely destroy his chakra reserves? because it doesn't. He's a puppet so he doesn't even need blood, meaning that the choice of the heart as the only remaining human part can only be because he can't remove the main source of chakra.

The human body simply isn't a uniform source of chakra, and losing arms is insignificant in the greater whole. You're free to disagree on everything else, but arguing that Sasuke has lower reserves because of his lost arm is simply irrelevant.