Oh no, like I said, there surely must be more than one way to reframe the scene while keeping the character's personality, motivation and relationships intact. If you are talking about the example I thought up of, my reasoning was that given her mother's behavior (going by how real people like her act in my experience), it's possible there's something the daughter mildly cared about (something more believable than an eraser but not necessarily something important) but her mother probably went hysterical in the past when she found her daughter "wasting" time or money on it when she could be studying or doing whatever the mother thinks is for her own good. So, it's something that could free her from her "facade of perfection" while also being more believable. Of course, like I said, this isn't the only way to reframe that scene.
I'm not saying the original scene was out of character; just that it was hard to take seriously. If you think about it, the other times she tried to "ruin" something (the class photo or the desk), she picked something with more believable context to it, even though Naoi had asked her for something like a pen (which was just as random as the eraser). While the manga has its unrealistic parts, the mom's character design isn't one of them. Nor is the daughter's. Having known people like them in real life, I'm not asking for "a typical child rebelling against their controlling parent complete with realistic dialogue". I imagined tying that scene to a part of her history could have felt a little more natural while keeping her character design intact.
I doubt she has much of a choice in these self-imposed restrictions when deviating a bit makes her mother act that way. She seems to have learned and curated these rules along the way, for example, as a child, she sees her mother threaten self-harm when she doesn't get a 100 on every test. She thought her mother would be happy with 90+ but finds out she's not. At all. And in a very traumatizing way.
