Thought about ethics & the game as fiction

Before I get started I know none of you think genocide is a good thing. I don't believe genocide is a good thing. You don't believe genocide is a good thing. Hopefully no one on this sub believes genocide is a good thing and we can all accept that and respect one another.

I'm curious as to a little double standard I've noticed, though. Often certain people say the events in the game objectively can't be described as such because it's fictional and the world inside the fiction does not work the way ours does and to call it that diminishes the word, what Renoir does is a 'merciful' gommage it's not genocide etc etc etc. Our real world morals shouldn't map onto the game because the metaphysics are fundamentally different, so to speak.

But if that's the case, how does that square with the (intentional on the writer's part, I believe) reading that bringing people back to life is a bad thing, when...it's fictional and the world inside the fiction does not work the way ours does? If my best friend dies, I can't bring him back to life, but Maelle was able to repaint Lune and Sciel pretty well. That is possible to do in this fictional world and she did it. I know there's (substantial and non-trivial) arguments about whether the Lumerians Maelle repaints truly are the same ones that died, but I do believe there is sufficient evidence to argue that Lune and Sciel, at least, are the same people.

So why are real-world notions of genocide and mass murder inappropriate to map onto the game, but real-world notions of death being final and it being wrong to attempt to cheat it not?