It's worth noting that as far as the canon lore is concerned nobody's Warrior of Light truly matters. Nobody is important enough to claim that their Warrior of Light is anything more than a 'what if' scenario that exists in a non-canon bubble. What their Warrior of Light would or would not do is completely irrelevant when compared to what the stand in Warrior of Light - the one shown in the official cinematics - is shown to be doing. It's also safe to state that any quest offered in-game, any FATE and any dungeon is something that that Warrior of Light has chosen to tackle.

For better or for worse.