Why would it? Almost by definition, forgetting to do something is hard to remember.
Are you telling me it never would come to one's mind what their child is doing and then it would start nagging on them-did I drop him off at the day care center?
A child is the most important thing in a normal persons life, but it seems that some people think it as an inconvience to be forgotten as quickly as possible.
What we say about a mother who forgot to feed or give water to their child?