What lore do you ignore?

[Iscah]

Not only that, the person who is pointing out that I'm coming at this in the opposite direction is right. I'm staring at the billion person high stack of corpses and deciding no good person does that. So this must be a bad person. They are coming at it from everything I am seeing and hearing is telling me this is a good and loving person, therefore this massive stack of corpses must be at worse a 'necessary evil.'

That's not what I have said at any point.

I am saying that according to the story there is no "stack of corpses", even figuratively, for Venat to be accused of. It is clear that the writers do not intend sundering to be equal to death, no matter what the player may think of it, and therefore it is necessary to use that interpretation when considering what characters have canonically done according to the story.

That does not mean I am condoning Venat's actions by that interpretation, or even that the interpretation is objectively wrong, only that when you are viewing the story that the devs intended to write, the villainy is not there and nobody was murdered by Venat's decision.

In a different context, if you ask me my personal opinion on the story presented in Endwalker, then yes it is absolutely a messed-up thing to have done – but I regard the fault to be laid at the writer's level rather than the character's. It was a writer's decision that sundering does what it does, a writer's decision that this is nevertheless not equatable to death, and a writer's decision that Venat could decide on this course of action and still be presented as a good character.