Board Thread:Boruto Discussions/@comment-31377229-20180125162054/@comment-30323490-20180125205005

You are making the mistake to think that the byakugan grants its users the ability to react to stuff. It does not. It just allows its user to see almost 360 and see far away.

The think is with the chidori is this: It's not just the fact that you have tunel vision and only see limited of whats in front of you. It's not just that. Even if you see something coming, at a very high speed it doesn't mean you can react to it. Unlike the byakugan, the sharingan actually manipulates the users body to more fluid movements, better timing, reflexes and most importantly tracking. The byakugan just does not.