"You must beware of shadows."
page 109 of The Little Schemer
It's better to focus on trying to do good, to keep learning and adjusting.
"who would willingly attack themselves to prevent their own abuse of the power they've newly gained? Only a rare few, I doubt that will change."
Of relevance - the "least privilege principle" in computer security involves designing the system to prevent itself from doing anything which it isn't outright required to do. It involves the host of a service to even lock themselves out of as much potential access as possible (for example via end-to-end encryption).