Exactly. Players don't try to stay together because of the children. That's exactly my point. They make a kid, when the situation becomes demanding the divorce. Then a kid with another partner, both women and men. Then divorce again. Having kids is not a measure for quality. Not at all  

 It actually is, as sustainable marriages are the most fertile.

There are different methods for achieving "kids" or even "more kids", but the most reliable path is to just find one woman and treat her well-enough to stick around. That's why men have evolved to treat women well. 

 Sustainable happy marriages have become quite uncommon. All of that is a wishful thinking. 
But sustainable happy marriages can be a measure of quality. I bet you are doing quite well on that.