You are like a blue dot on a blue wall. You can't see the system you are in because you are in it. The fish can't see the sea.
Like you trying to see yourself with no mirror, no reflection. The performer can't separate from the performance without reflection. Or a reflector.
High performers have a coach. The coach is a mirror.
High performers have a review system. The data is a mirror.
Combine the right two and the system and performer are clear and in focus. A white dot on a blue wall bringing insights and competitive advantage no one noticed!