Board Thread:Theories and Speculation/@comment-36649908-20180820043658/@comment-25632268-20180827140305

It is also possible that Kawaki simply overestimates Jigen power. Remember, kids in Boruto series never experienced power of Hashirama or Madara. When Naruto entered his chakra mode, Kawaki was clearly shocked, meaning he has no idea about tailed beasts, jinchuurikis and all that.

Also - what Littlegen said. Simple adding new OP characters to keep series running.