Yes, it certainly gives a young person a better sense of identity to know something about a missing parent. Psychologically healthy people can accept not knowing usually but most people are just big kids forever and can't stand back and survey the situation, like divorce, objectively. It's like this thing at the moment about feeling empathic with childless women (not by choice). First they were scorned as "frigid" or "selfish" and now it has swung around to forming groups and having therapeutic meetings. Maybe something similar can happen with families, unexpected children and divorce.