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? For example, it could be that someone is only a little bit less likely to have dramatic arguments with their "ideal match" than with a random partner -- they just happen to be an argumentative person or haven't figured out better ways of resolving disagreements.
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.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.