I wonder to what extent the problems you describe (divorces, conflict, etc) are caused mainly by poor matching of the people having the problems, and to what extent they are caused by the people having poor relationship (or other) skills, relatively regardless of how well matched they are with their partner?
Well, the success of arranged marriages in cultures that practice them suggests the "right match" isn't that important.
Why does it suggest that rather than that the arrangers are better at finding the "right match" than the persons to be married?
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.