Because fights don't feel "small" to her.
You think: "It's just an argument."
She thinks: "If he talks to me like this now, it means he'll always treat me this way."
For her, every fight isn't a moment — it's a preview of the future.
CTTRO
“There is no right answer. What we should be good at isn’t making the choice itself, it’s doing our best to make that choice the right one.” Good Partner Ep16