For as in one body we have many members, and the members do not all have the same function, so we, though many, are one body in Christ, and individually members one of another.
Romans 12:4-5

Feet are useless without knees, fingers without wrists, and vice versa. What good is a knee without everything lower? They don't make good feet. Shepherds are useless without flocks and flocks are useless without shepherds. Everyone has a role in God's kingdom and no one can fill every role.