But a few things that contradict your viewpoint:
The Medieval Child: an Unknown Phenomenon?: High infant mortality rates do not seem to have prevented parents from being fond of their children, however likely they were to lose at least some of them to diseases or accidents. Miracle reports and other types of documents attest to the lengths to which parents were prepared to go to obtain healing, rescue or salvation for their children, as well as to their grief when their efforts proved futile
Children in the Middle Ages:: Historians like Aries also note that strong parental feeling existed, despite abandonment and infanticide. The death of a child was always met with profound grief.
I can supply more links if you like.