Common Sense is often relied upon for making big decisions. In many, everyday ways, it serves well because you are navigating a world that is familiar and even repetitive. However, when interacting with larger groups of people, when interacting with people from different walks of life, and when making decisions that don't involve normal situations within your comfort, it cannot be relied upon. Despite this, your "System 1" brain will comfort and console you as you rely upon Common Sense. In order to make larger decisions with more impact outside of your direct, anecdotal experience, you have to rely on "System 2," the larger, more powerful part of your brain that doesn't like to wake up and contribute.