One likely reason for less divorces in the secular world is that so many children of divorced homes don’t want their kids to go through what they did.
Point is not everything positive in the secular world can necessarily be duplicated by us when it comes to such complicated societal issues. And definitely not if its cyclical. B”H we weren’t part of their deep downturn so we won’t have the same upswing.
Which doesn’t mean we don’t have a lot of issues to examine. It starts with chinuch and not spoiling our youth. Good shalom bayis doesn’t begin with marriage or dating/engagement.