I believe it is unintentionally egocentric to assume a single individual's perspective is enough to guarantee correctness. I imagine most of the time that individual makes the best call, but that's not less egocentric. It's easy for an individual to qualify the correctness of technical material, but not easy to do the same for soft skills like communication. As a senior developer or leader, you need some egocentricity in order to have a focused project and clear goals.