[Spoilers] Death and reincarnation

[MrThinker]

I am ever intrigued by the amount of people trying their hardest to churn out theories that absolve Hydaelyn whilst portraying Zodiark as an inherently evil being. Nothing we know so far suggests that Zodiark did anything more or less than what was asked of him after a bunch of Ancients willingly sacrificed themselves to summon him twice. As for tempering? Ramuh tells us that it isn't necessarily a voluntary action. Is it really that difficult to accept that things might not be so black and white?

Okay now here's the thing, why does everyone assume he was 'summoned' twice instead of just persisting after being summoned the first time until he was sundered by Hydaelyn?

The Final Days. What began as isolated incidents soon swelled into a world-spanning threat...
The Convocation of Fourteen─well, it was Thirteen at the time─endeavored to create a will for our star. They would repair the fundamental laws of order and halt the spread of destruction. But creation on such a scale required an immense source of power...
Of those of us who still lived, nearly half offered up their lives in the name of salvation. And from their sacrifice, Zodiark was born. Just as we had hoped, He reached forth and halted the march of oblivion.
...Yet oh how the star had suffered. So many species lost. The land was blighted, the waters poisoned, and even the wind had ceased to blow. Once more did our people give of themselves to Zodiark. Another half of our race sacrificed to cleanse the world; to ensure that trees and grasses and myriad tiny lives would sprout and grow and flourish.
The cycle of life had begun anew, and we reconsidered the means by which we might protect it. The Convocation decided thus: we would nurture our world until it was bursting with vitality. Then, when the time was right, we would offer some portion of its living energy to Zodiark...
In return, He would restore to us those brethren whose souls had fed His strength, and together we would resume our role as stewards.

This doesn't read to me like he was summoned twice, but was there already, and they just gave their lives up as fuel for his powers, like modern primals would consume crystals to sustain themselves.