Purpose of Marriage?

According to an article by The Associated Press a woman around the age of 25 or so has a 50/50 chance of being divorced and a single mother by the age of 45. Other studies conclude she has a 50/50 chance of being a single mother, with 2 or 3 children by the age of 27 and 31 years. With those odds what is the purpose of marriage?

Wouldn't some guidance from "the" church be appropriate?

Recently I read that while fathers often tell their sons to "be a man" or "be masculine" they have no idea what that means. Their father said it to them so they say it to their sons.   

We are a congregation of 150? in business for 20 years,  we have one adult class, no elders, no deacons, no prospects two adult teachers and a couple of fill-ins and we attend classes where the question is proposed "Why is it important to study scriptures?"  

I wonder if we know if we know the purpose of marriage? I wonder if we know what it means to "be a man." If it is important to study scriptures why don't we?