Could this be an example of the noncentral fallacy? One big reason humans try to avoid death is because there is only one of each individual & once they die they are gone forever. If a simulation is made of me and gets turned off, there's still one of me (the original). In this alternate reality there's also the chance that Omega could always just make another new copy. I think the two situations are dissimilar enough that our standard intuitions can't be applied.