that's right. all the things that happen in the series so far is NOTHING to her.

all the corruptions, pain, suffering, betrayals, sadness…

… to her it's not worth her time.

No, it's far worse than that, she KNEW. She knew that Pink and Rose were the same person and she just played along with it. She unleashed the corruption on Earth, she let Yellow and Blue be consumed with agony for millennia, and she knew it was based on a lie the whole time. It's worse than mere indifference, it's sadistic cruelty.