What did I say that makes you think I am "living in my tunnel vision"? Please do not confuse my comment with those comments from others; I'm not even trying to have a conversation about the morality of young marriage or whether there is a 'right' or 'wrong' age. I'm not taking about that at all. My objection to using divorce rate as evidence would be the same if all of your children and your wife got married in their 40s. I still find divorce rate to be irrelevant.
There are so many other factors for why a couple might not get divorced other than their marriage being 'successful'. Cultural peer pressure is one of them. If a person is in a society where divorce is stigmatized, they might have a terrible, unhappy marriage that is completely unsuccessful and still not get divorced. They might have a religious objection to the concept of divorce. There might be kids involved that skew things. Or, they might just not want to get divorced. I know couples that have been married for forty-odd years, have never considered divorce, but certainly are not in 'successful' marriages because neither of them are truly happy in their marriage.
Staying married and not getting a divorce doesn't make the marriage happy and successful.