There’s a point in the Moral Mazes sequence that if you don't have absolute power, you're going to be really strongly incentivized to do whatever it takes to get it. And if there are lots of people seeking power, there's going to be no Slack in the system to think about anything apart from getting ahead.
Weirdly if you had absolute power, you might be more likely to do good, because you then have Slack to pursue your values. Concretely, I’m not sure that Putin would be brutally murdering his opponents if those opponents posed no threat to him - it’s his limited power that makes him do that.
(This is relevant to scenarios where a very powerful dictator ends up controlling the world/universe: it makes me a little more hopeful about such a scenario, though I think we should be trying to avoid it.)