It's about the people
God has always called us to live distinctive lives, different from the surrounding culture. One of the distinguishing characteristics of the Hebrews was their identity as a collaborative community under his direct leadership. However, they did not want to stand apart from surrounding nations. They imitated their neighbors instead. They begged for a king to lead the nation, to subdue their enemies, and to resolve their conflict. A priesthood where they all must share responsibilities must have seemed like hard work by comparison. Such interdependence would require humility, vulnerability, sacrifice.