Endwalker's message (spoilers!)

[Vahlnir]

Being a cute girl and shedding alligator tears will get you off the hook for wiping out almost the entire universe and crusading against the last world in existence. Yes I know dynamis and emotional reaction and stuff, but come on, she had tens of thousands of years to think about this.

She wasn't really let off the hook though. She wasn't just one entity either, she was part of a collective hivemind, more or less. And only one of them came to realize that they might have made a mistake or two along the way. Said collective died after we beat them, so...there's that too. No one was really let off the hook here. Being able to sympathize with the villain (at least somewhat) didn't get in the way of delivering retribution.