The reasoning is that a "your" kid doesn't only depend on genetics, it's also through adoption, or other family system (like in Africa, some kids are raised by

The reasoning is that a "your" kid doesn't only depend on genetics, it's also through adoption, or other family system (like in Africa, some kids are raised by their aunt and uncle). Because deciding overnight that the kid should stop calling that guy daddy is not really something we want to be simple like fetching a baguette. Since it's a medical procedure, they used the medical law to limit that. A family matters judge has to be involved, and the outcome has to have a purpose. In this example the "father" was very distant and not really involved in raising the little girl and the couple was splitting, so the question of paying child support was raised. I guess the lack of a fatherly bond and the lack of genetic link made the judge decide against the child support and allowed the father to be removed from the child birth certificate (but it's a soft limit, the judge has to make a difficult call for the definition of father).