> Serious question, why is this a metric? Changing your mind should be a good thing. ... why is consistency such a highly regarded metric?

It's not about consistency, it's about being right consistently. Unfortunately, most decisions whether made by an individual, CEO, or politician have to be made with imperfect information. The data just isn't there to do a full analysis. In data's absence, when you need to make a decision, you rely on instinct and foundational principles.

Of course, when the data becomes available you can adjust, as anyone should. But when you have good enough instincts or principles, you can operate effectively without good data, and that makes for a good leader.