Yes, I did read the story. The part I was referring to was after the world had stabilized again. Half of their remaining population willingly sacrificed themselves to summon Zodiark, and half of what was left willingly sacrificed themselves to restore life to the land.
And THEN they planned to sacrifice some of THAT life to bring back all of the people who sacrificed themselves. And some people didn't like that, which is why they summoned Hydaelyn. To stop that.
We aren't shades. We're people. Different life, more fragile life, but still life. The whole point of that big climactic cutscene is that it isn't up to the Ascians to decide whether that life is worth preserving. It's our life, our world, our story.
If the calamities come, then they come, but the WoL and every soul that wants to protect the new worlds is darn well gonna try to stop that from happening.