If I were a billionaire why would I want to be president? The answer is so simple that it can be summed up by a comic book villain.
(2 minutes long, [b]first 80 seconds are set up[/b], after 1:20 is the main and important part. The first 80 seconds are on why a minor DC character is going to try to kill Lex Luthor to prevent Superman from having 1 bad day and killing Lex Luthor in a way that scares the populace and thus creates
1) A sense of fear about superhumans even the good guys
2) Superman says fuck it all, if I must put down people like Lex Luthor, I will make the entire world good and create a dictatorship that even though "enlightened" its still tyranny.