"A little humility at acknowledging a supreme being is probably something that most people could use."
One does not need to acknowledge a supreme being to express humility. It takes little more than acknowledging the existence of the universe as a whole to be humbled. I agree that most people would benefit from showing a little humility, but I'd rather that humility come from realizing humanity's true place in the universe than from believing in something that is a purely human creation to begin with.