Children ARE the primary end of marriage.
Modern woman's problem is not that. It is disobedience to her husband. An insane narcissism that has affected trad women also.
I am curious are you speaking as a father and husband or as an outside observer?
Creating children is the primary end. Making them self centered and the center of the family is not. We are talking about how children are raised.
If the spouses don't like each other or grow a part the marital act that creates children becomes harder and harder to do.
Again you keep making bad assumptions.