While the argument transpiring before the chunin exam's semifinals is a negative moment between Sasuke and Sakura (since they have a dispute), it's nonetheless an important and characterizing scene between them.
In this scene, Sakura is sweet and caring while Sasuke is the idiot who should've listened to Sakura but didn't. After all, Chapter 66 is tellingly titled "Sakura's Advice", and it her counsel was indeed good advice.
Sakura used to buy the cool, tough guy act and fawned over Sasuke with the rest of the fangirls during her academy days. But after all that transpired in the Forest of Death, Sakura is no longer so naive. She saw both how scared and how ruthless Sasuke could be, she saw how human and flawed he actually was. Before her eyes, Sasuke had experienced terror and rage and pain and other intense emotions, and Sakura's image of the unshakably cool and calm Sasuke had been stripped away, removing her shallow fangirling and leaving behind only genuine concern and care for a friend's safety and well-being.
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In regards to Sasuke, Kakashi and Naruto were idiots who glibly elected to ignore Sasuke's worsening mental state because they didn't want to deal with big inconvenience it would be for them. So even when Sakura voiced her concerns (multiple times) to all three of her teammates and sent up red flags that something was seriously wrong with Sasuke and that it was not okay and needed to be dealt with, Naruto and Kakashi ignored her and told her everything would be fine.
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