I could make the hard choices if needed, once there. Because at that point it's about what is the greater good. Even if you really can't say for certain, someone making a bad call is most often better than no one making a decision.

The problem is that in order to become a benevolent dictator, you have to chose to hurt people that don't matter to the greater good, or very likely are important to the well being of the population. With the only justification being that maybe by consolidating power you can make the world a better place. And there is just no way to square that circle other than violent narcissism.