Yeah I came here to say this too, though I don't think it'll be popular. Schools are like prisons your parents send you to every day so they have time to work.
Indeed. Glorified daycare. All those kids are there just to enable their parents to work during the day. At some point they figured they should do something useful with all that time so they started teaching stuff in classes which has the added benefit of structuring the children and making it easier for one teacher to manage them.