What are some key points for the argument "Why is school necessary"?

If you are
referring to education in schools, then I would argue that teachers are
college trained professionals in the subject of student learning and in their specific content
area.  Even smart people don't know everything and need guidance and feedback from the people
who know more than they do. For example, I was always a very good reader, but it took my high
school and college education to open my world to a more critical appreciation of the craft of
the writer.