I feel that the presence of both parents is very important in the life and upbringing of a child.
Many children who turn out to struggle through life can be said to be without parental support.
In other sphere, single parenting might hav been productive but nevertheless, the proportion is low.
It is a natural phenomenon that the father and mother take responsibility of bringing up a child.
You are very right, too. There must be parental support regardless of who is in the picture or not.