Board Thread:Theories and Speculation/@comment-31966672-20200409171208/@comment-4961229-20200414161747

Ravenlot 27 wrote: I meant it as a benefit since Rasengan's lack of speed factor doesn't produce tunnel vision, as in case with Chidori, so you don't need any supplementary methods like a Sharingan to cover that weakness. That's the main difference between Rasengan and Chidori.

While it's true that Chidori can be used without applying speed and by catching someone off guard, it was still created based on this aspect. You have a better chance to catch off guard if you move faster, right? Take the example of Boruto's recent fight against Boro, only Sarada's Chidori was fast enough to destory Boro's core before he had the chance to react and hide it. Rasengan cannot do that, and as far as I remember, in the anime Jiraya even pointed out that your opponent isn't gonna wait to be hit by Rasengan if he sees the attack coming. Dafuq?!?

ANY high speed movement will produce tunnel vision and require something like a doujutsu or threat perception to counter the counter. Why would you think running with Chidori and Chidori alone produces tunnel vision? Why would you think that you somehow are prohibited from moving at high speed with Rasengan, instead of Chidori, and therefore not in need of the same perceptual ability?

Rock Lee describes why he would never run full tilt toward an opponent at high speed. He says he doesn't have the eye to respond to the counter. Rock Lee has neither Chidori nor Rasengan, yet he's worried about the exact same thing that Minato described was wrong with Chidori. That means this is a common problem, not merely one associated just with Chidori.

We saw Naruto specifically reproduce this same effect in Sage Mode and respond to Raikage's attack. Raikage didn't have a doujutsu and couldn't respond Naruto's counter, because Raikage had tunnel vision. We saw Obito attempt to counter Minato and FAIL to respond to Minato's counter (maybe if he'd had a Byakugan in his left eye under that mask he might not have taken that ass whooping).

We also saw Naruto use Six Paths Sage Mode threat perception to respond to Madara's Limbo counter. It is always necessary at the higher levels to be able to respond to counters when fighting at high speed. When you get to the Juubi Jinchuuriki level, almost everything you do is at high speed.

Rasengan CAN indeed do that. It did it to Pain. It did it to Obito. It did it to Raikage. There is absolutely no reason you can't use Rasengan AND move really, really fast with Rasengan. Sage Mode Naruto could've easily done this to Boro's core: https://imgur.com/z7Egopg