Think about the ego required to run for President, not to mention actually continue functioning as President. Actually believing that you are the best choice to be the most powerful person on the planet.
> Actually believing that you are the best choice to be the most powerful person on the planet.
Even excluding the immoral or amoral considerations that could supporting run for or functioning as President, that's not required: you only need to think that you are a better choice than anyone likely to get the position if you don't.
I think it makes a pretty big difference; while it requires some ego, it doesn't require nearly as much as the "best choice" presentation makes it seem if you have a justifiably narrow view of the objective indicia of potential electability ; seeing yourself as the best qualified of maybe a few dozen people well-situated to compete for the Presidency given the realities of the way such campaigns run -- a condition which is mostly do to selection for traits which, while they may be related to running for President, are arguably only loosely correlated with effectively performing as President -- takes a lot less ego than seeing yourself as the best qualified person for the most powerful position on the planet from either the pool of legally qualified options or, even moreso, the pool of everyone on the planet ignoring legal qualifications.