As someone who just finished the raids, let me just say as a history and mythology nerd I greatly appreciated this story and strongly disagree with those that say they feel bitter about the writers explaining the origins of the Twelve.

It had to be done when you have set up an entire story based on an all-powerful ancient civilization with the literal ability to create gods and to destroy entire worlds.

If the Twelve’s origins were never revealed, you can rest assured one of the very first questions people would ask was, “Wait what happened to the Twelve? Why would they let all this happen? Are they tied to the sundering in some way?”

Additionally, knowing what we know now about Endwalker, most people would have correctly theorized that the Twelve were the creations of Hydaelyn with or without the Myth of the Realm raids. It made too much sense. I saw threads guessing this very thing before the first raid was even playable.

It is impossible from a world-building perspective not to address the Twelve in the way they did. The writers followed their own rules in that regard.

And after that confusing debacle that was the Nier raids, this one was a breath of fresh air. In that I could actually follow it.