Criticism can be constructive, destructive or a little bit of both. Knowing when to absorb criticism and when not to, is a skill. If we absorb destructive criticism it could negatively affect our self-esteem and productivity. On the other hand, if we absorb constructive criticism it could help us to improve and become better versions of ourselves.
We are often quite unaware of how our belief systems are influenced by various external factors, and how those beliefs may impact on our decisions and actions. Not interrogating information that we are being fed on a daily basis could quite easily lead to a skewed view of reality, which may lead to inappropriate decisions or actions. Reflecting on how we have come to our conclusions should be standard practice for leaders.