Like a tailor makes a “bespoke suit” for a particular customer, our unexamined minds have a tendency tailor our own “bespoke truth” that satisfies our preferences. But, when we ignore or exclude aspects of reality that we don't prefer, we miss out on important information that could be helpful in making wise choices.
When we practice mindfulness, much of what we are practicing is being accurately self- and other-aware. Bias and stereotyping are distortions of reality. Mindfulness helps us learn to see through some of the illusions and distortions our human minds are vulnerable to and make wise decisions about them.