@Doenyon Ik, it's pretty stupid. However, you still see it in these stories where there's a "villainess" and a "heroine" way too often, and that the heroine is low classed / commoner and the dumbass prince and the harem back the heroine for unknown reasons.
I think that her original behavior has changed a lot since she reincarnated by being in an environment as messed up as her home, I also think that the butterfly could have a small impact too