Why do people have life-saving secrets for rebirth and reincarnation? Why does she have nothing?
The point is that she has never expected to be reborn or travel through time. Why arrange for her to travel through time?
Dumbledore, you want me to deal with Voldemort, yes, but don't expect me to follow your script!
Snape, go away. I'm grateful that you saved my life, but this is of your own free will. Don't think that I don't care about your vicious words that hurt me!
Draco, my sister will teach you that this is not how you make friends with your brother, this is how you make friends from time to time!