Board Thread:Theories and Speculation/@comment-30736821-20170426173032/@comment-734582-20170429090527

Mr. Grave wrote: Whatever the chakra spirit is, it seems to prey on people's subconscious desires (Denki's desire to stand up to his bullies, Lee's desire to be more confident). This is why Kawaki can't be Iwabe - cause Kawaki seems to bear hatred for the shinobi system while Iwabe wanted to spin the wheel and take it 12 years back, in a time when it was even more shinobi-centric than it is during Boruto's timeline. So, there's a clear contrast in their motivations. We don't really know kawaki's motivations. It's possible Iwabe's motivations evolved over time to change the Shinobi system into something else entirely. e.g. he finds out about it's origins and wants to change it into something similar yet better.

For example, by returning to the pre-village state of Shinobi clans. (since the Shinobi system itself is largely made in the Village era)