I think it's worth noting that truly unlimited power means being able to undo anything. But is it wrong to rewind when things go south? if you rewind far enough you'll be erasing lives and conjuring up new different ones. Is rewinding back to before an AI explodes into a zillion copies morally equivalent to destroying them in this direction of time? unlimited power is unlimited ability to direct the future. Are the lives on every path you don't choose "on your shoulders" so to speak?