In a harsh environment, a ninja’s will is tempered, but their Chakra is constantly drained. Coupled with the need to face an opponent in front of them, every bit of Chakra must be calculated with precision. Sasuke was currently in this exact position.
At the beginning, he would use all sorts of flashy, cool movements, along with Chakra-draining techniques like Chidori and Fire Release. However, after being beaten black and blue by Ringo Ameyuri a few times, he learned his lesson. It wasn’t that these flashy, high-impact techniques couldn’t be used; it was that he had to discard useless moves and meaningless attacks. Orochimaru didn’t demand that Sasuke reach the level of Itachi, who could stretch one unit of Chakra to do the work of two, but he did insist that Sasuke learn to use his brain instead of just throwing a powerless tantrum.
"Kid, with combat experience like yours, you’re just wasting those eyes!"
Chapter 315