He did. If he's so powerful - there must be another way. A better way. And he's just refusing to see it.

[ Orpheus is confident of that much, because what problem could possibly be solved only by so much death and despair, by inflicting more suffering to undo that of the past? ]

If he'd just - listen to us, or if he'd asked us for help instead of doing this, I'm sure we could stop it all. But he didn't. He chose this, instead.