
Originally Posted by
Cilia
you could almost take the Warrior of Light out of the story and it would spin on none the wiser.
But that's just it, the entire universe is constructed in such a way that our presence is a necessity for even the tiniest of fetch quests.
(spoilers for everything up through 3.0)
Even the "main characters" we meet are basically presented as one of two flavors. On one side you have your G'rahas, who have an entire character arc dedicated to discovering that they are, in fact, incapable of accomplishing anything, and accepting that and leaving everything up to the real hero is portrayed as a positive development. Because it's not about him, it's about us, and how great we are.
On the flipside, you get your Estiniens and your Ysayles. They have arcs about doing things on their own, having their own changes they want to bring about in the world, but in not relying on us, they end up punished by the very construction of the universe, ultimately leaving their tasks for us to finish for them anyway.
Alisaie is the only character in the middle of all this, but she gets a pass because while she wants to be a hero like us, she parts with us at a level that still isn't a threat to our uncontested superiority.
But in general, arguing it could spin on without us is pointless, because the universe itself is constructed to impress upon the player how meaningful their contribution is. It all comes back to the FF1 epilogue scroll: "The real hero is YOU."