mono1995- marriage is not something that saves anyone from anything. If a boy (or a girl) is not ready to get married and gets married anyway, he can do a great deal of harm. I have heard horror stories about girls my age who have married boys who were simply not ready to get married.
By the same token, I have friends who married boys who are 20-21. Obviously I don’t know what goes on in their houses, but it seems to me that the boys they married were ready. I believe that those boys are the exception, rather than the rule.
I would assume that parents know their sons and understand their maturity level. If a boy is mature enough to get married at a younger age, it seems to me that parents would not stop him from dating.