And Chaldea, in part 2, as opposed to part 1, is depicted in a somewhat antagonistic/gray light, insofar that they're explicitly denying the Lostbelts so as to defend and restore PHH. It's not like with the main Singularities where history is being relatively bloodlessly corrected once Chaldea resolves the incident. (deaths that occur in the Singularities will still happen in human history, but under different circumstances).
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The assumptions of the antagonists.
They perceive humanity to be doomed, and they might even arguably be correct about it, but the story always depicts them as being in the wrong for robbing humanity of an open future.