I'm reading Principles by Ray Dalio. In it he mentions how Bridgewater had been using myer-briggs to test and measurement their employees personalities.

I've always been dismissive of the myer-briggs test. Since the tests are "not reproducable", must mean it's at best a pseudo-science.

But then I realized, who am I to dismiss the idea? I'm not an expert. Much smarter people than I (Dalio) believe in it. At the end of the day, does it help us move closer to understanding the differences between our minds?

I'd say yes it does. It may not be a "perfect" 100% correct model, but at least it's a step towards a direction.