>>/225/
Age of Consent isn't just about destroying family unit but helped the state in many ways. 
Teenage pregnancy is going to affect the child's education and can push her back a year or two from other people her age which will affect her future, thus making her an invaluable investment for the state.
Teenage pregnancy also leads to overpopulation, in a way.

But yeah, it's selfish from the point of elites because ultimately it's about control.

There's definitely some good to it. 
Like he said here  >>/228/
Women children like in Islamic Nations suffered much when they got married off young as soon as she bleeds, in a confused state, sometimes to old men. Many still think having a girl child is a curse, some kill them off as a child.