This principle is a bit weird to frame some kinds of decisions around, it ignores that fact that inaction also has a cost and consequence, and ignores the fact that there are unknown unknowns.
That’s why to anyone else, it is simply a “rule of thumb” because internally, there are simply certain kinds of decisions this doesn’t make any sense for and there are two other principles that come into play.
We all eventually come up with our own “truth” and principles to live by. Eventually. I think it’s just a product of getting older and especially going through things largely outside of your control.