In the dark multiverse, slaughter is not a sin—weakness is.
The Great Summon, which took place fifty years ago, forcefully elevated an almost magic-free world, bringing endless calamities and sacrifices... Yet without that day, perhaps the disasters of this year would have been an insurmountable catastrophe.
The invasion of the Octopus Tribe could have occurred even without the Great Summon or the Nirvana Plan... And even if it weren't that disaster, there would surely have been some other world-ending calamity.
To use an imperfect analogy, the world's immune system was activated by the Great Summon, while the Nirvana Plan introduced external vaccines, viruses, and medicine… Whether or not there are hidden risks in this remains to be seen, but without undergoing these trials to build an immune system, a single major illness could have been the end—death might not have been avoided this time or the next.