Wisdom is not gained by knowing what is right. Wisdom is gained by practicing what is right, and noticing what happens when that practice succeeds and when it fails.
Adult librarians are like lazy bakers: their patrons want a jelly doughnut, so they give them a jelly doughnut. Children’s librarians are ambitious bakers: 'You like the jelly doughnut? I’ll get you a jelly doughnut. But you should try my cruller, too. My cruller is gonna blow your mind, kid.