He prepares his child for an increasingly uncertain future. A dad uses the language of coaching, training. He sees himself as a sponsor of his child. He transmits character and competence, teaches him a way of life. And he is a nurturer.
Divorce is the problem.
Pretending that better divorce is the solution amounts to little more than a way of easing our conscience as we lower our standards. Divorce weakens motherhood, but it does not end it. The children typically remain with the mother, and the mother-child bond is not broken. Fatherhood ends after divorce more often than not. We need to be a society with a much lower divorce rate.