I don't think the accessibility to power alone is corrupting; it's the accessibility and the usage of more power than we can handle.

My view on the subject is that all power has a corrupting influence and that every individual has a certain level of resistance to such influence, which they can change throughout their life. The reason absolute power corrupts absolutely is that it would require an infinite level of resistance to corruption to not be corrupted. Basically, you would have to be omnibenevolent to handle being omnipotent.

You are right though, power does expose how corrupt someone is.