I've heard a version of it, only it was based in a bar with a big, mean bartender and consisted of less money and avoiding a beating.

Never attribute to malice that which can be adequately explained by stupidity.
(attributed to
Robert J. Hanlon)

People with true credibility and integrity don't need to tell other people how great they are. They also don't need to belittle other people to feel superior.
(msmith)