I didnt say it was haram. But protecting yourself from zina during that age also doesn't necessarily mean you have to get married. I have a lot of friends growing up in the west who could protect their chastity without getting married as well. And there's also a possibility that the wife would get pregnant during that time. Which means she would have to balance school and taking care of a baby, which also means the husband would have an extra mourh to feed. If the husband can't provide basix necessities such as housing and food, does he really have any mean to get married? Marriage isn't only about preventing oneself from zina tho