What's the point with that quite lackluster story in Endwalker?

[Brinne]

But as cool as it would be to stop one of those real world events there is no telling the repercussions that would happen because that had changed. Heck if you changed the Transatlantic Slave Trade there's a good chance I wouldn't exist and more importantly what atrocities would(or wouldn't) occur because who exist or who doesn't exist. Fundamental butterfly effect theory.

Oh, I'm absolutely certain that if not for a number of horrific atrocities I wouldn't exist.

I still believe it's the right thing to in no uncertain terms condemn those atrocities and the people who committed them. I don't think you give slavers in the past a pass, or qualify your condemnation of what they did, because "well without them our world wouldn't exist as it does today." Shadowbringers had a good line about this when Alphinaud was talking to Emet-Selch - "we define our worth, not the circumstances of our creation." Whether or not it would be "okay" or "better" to go back and unwrite history, potentially erase timelines full of people, is a more complex question - we should probably ask for G'raha's thoughts about this! But asserting our right to live, while also acknowledging the 'circumstances of our creation' sucked and was wrong, and that the people who were wronged deserve justice, are not mutually exclusive ideas.

I had hoped that the narrative word on the Sundering would be along the lines of: "an absolutely horrific thing that should never have happened, but now that it has, probably not worth the human cost to undo at this point." Instead, we got, um, something else?