Young married couples must be together? What does early marriage mean?

First of all, explain what early marriage is, that is, marriage arranged by both parents, and it is early marriage before you are born or just born. In the old society, it can be said that when we were young, we got married young and were destined to be together when we grew up. However, living in a new society, it seems unnecessary for our parents to arrange marriage. You should know that feelings can't be forced. Why stage a so-called doomed love?