Remember, throughout history and up until not long ago people needed to have children in order to have someone help support them when they got old and could no longer work or if they became disabled (if not children of their own, at least some sort of large extended family.) It served a real function and filled an important need (the original "social security" if you will.) It is not surprising that folks have always put such important on getting married and having children, and some of that would still hold over today.
