There is evidence to show that early intervention with women who have been in care or have had bad parental relationships can turn around the next generation of ill-adjusted parents. I take the view that if we do this with fathers, maybe we would have the next generation of responsible fathers.
It is no secret that I firmly believe that a child should have an involved father wherever possible as long as it isn't going to impact adversely on a child. I think the state should be far more involved when the baby is being incubated so that mothers and fathers are aware of their responsibilities although, of course, in a perfect world they'd be aware before the baby was conceived.
I think it is quite natural for a woman to believe she is the most important person in her child's life because she has that relationship even before it is born. However, as a child who didn't know her father or any of her relations until she was 47, I can tell you that there are so many occasions when you need to know about your paternal side, not least medical history, security screening, etc. It can be crucial with some medical conditions to know your family history. Bowel cancer on both sides of the family or on Dad's side through the generations equals regular screening.
This is, of course, without even taking the emotional side into account. Abandonment often leaves you without good self esteem. If you are more like your father than your mother then you are like a square peg in a round hole.
There are just so many reasons why a child should have both parents wherever possible.