Marriage, under those conditions, exists for arraigned marriage, and forcing under age kids to marry for whatever reason, pregnancy, etc. to save face. I guarantee you that very few people who married at 16, are deciding to marry, and then getting their parents to consent to it. This stuff exists because of antiquated ideology. They are there for fundies, and people who still think of kids, and women, as property, regardless of religious disposition. 16 is a compromise between the religious, and far right parties, and the rest of the government.