You just need a way to rationalize it. For me, I focused on the fact that the praise the Warrior of Light usually receives is in the vein of never giving up, not that they are just plain powerful. As such, I don’t view my character as any more powerful than any of the Scions, or Raubahn. I think the narrative of Shadowbringers and Endwalker support that idea. That fight with Zeno’s at the end was just pure willpower at the end, neither had any strength left and they still fought till they couldn’t move.