A
Kids are sleeping together as soon as they hit puberty (or earlier) anyway, lowering marriage ages isnt going to do anything about that. And if a person is a christian and can't wait and control their hormones until they reach marriageable age which is 17/18, there's something wrong with them.
The bottom line is, our society is not set up for people to become financilly independent at a young age. To make enough money to support a family requires a decent paying job, and these days that all too often requires years of education or aprenticeship or experience. I mean, it's like there's there different ways to get to that well paying job, but they all seem to be time consuming. I know that young men can often make decent money with physical labour but can they do that for the rest of their lives? I mean, some can. They do the physcial stuff when they're young and then they do more management stuff when they're older. But really, if a guy is going to get married he just doesn't need to be making good money now, he has to have a plan of how he'll make enough for the long run. He also, of course, needs to show that he can manage money.
See, there is kind of a general trend that the older someone is when they get married the more stable the marriage will be. And, generally speaking, children who are born to older parents do better. But don't get me wrong. There are disadvantages to waiting to have kids. But the way that I see it, is if I value God's gifts of marriage and children, then I should choose the most opportune time in my life to have those things in order to give them my best. In the age of high divorce rate and low marital satisfaction, I want to do everything I can to make sure that I don't end up as another divorce statistic. And a big part of that for me was to get my education and career established before I enter into marriage. I know a lot of people who married while still in universtiy and that's fine for them, but I couldn't have handled that.
I guess what I'm trying to say is that it's like a cake in the oven. Don't take the cake out of the oven too soon just because you're hungry.