Lemme break it down.
As demonstrated in the fight with Mahito, Yuji can predict his opponent's moves by reading their flow of Cursed Energy, and we can reasonably assume that this principle is the same for the other Jujutsu Sorcerers, as no other matter method of Analytical Prediction is ever given.
Now...
Yuji is unpredictable, because his flow of Cursed Energy is delayed. People expect a punch, receive a punch, and then receive the delayed Cursed Energy.
Average fighters are predictable, because their flow of Cursed Energy is simplistic; linear, in a way. "What you see is what you get".
Elite fighters are unpredictable, because they have such a precise control over their flow of Cursed Energy that they can trick you into believing they are delivering one strike by flowing their Cursed Energy into their left fist in order to feint you, leading to you anticipating a left punch, only to then redirect their energy into their right fist and then punch you, catching you off-guard. It is these split-second changes that throw an opponent off, making them difficult to read, hence why the man in the example expresses his doubts on whether or not the elite's right punch is actually a right punch, through and through.
Yuta, on the other hand, is the antithesis to all of this; Yuji even points out that his case is nothing like the average or the elite fighters. He does not flow his Cursed Energy into a single spot, like the average fighter, which reveals their trajectory, nor does he feint his punches by altering his flow of Cursed Energy within split-second intervals, as is the case with the elites. Rather, his entire body is constantly flowing with Cursed Energy, so it is all in the same place and never changes its course. His flow of Cursed Energy is consistent; every one of his strikes are straight to the point, so he is easily predictable.
Do you understand now?
