I find the whole discussion interesting. Especially telling I think as characterized by those who are parents and those who have not had that responsibility.
While people do try to be consistent with their own internal values, those values do change over time and may even vary depending on the situation. Over a 140 years ago Emerson gave us the following quote which came to my mind.
"Foolish consistency is the hobgoblin of little minds, adored by little statesmen and philosophers and divines."
My point is that people are individuals with faults, failings and inconsistencies. Most children recognize that about their parents at about age nine. Teenagers love to point out a parent's inconsistency. Most parents are usually equally adept at pointing out their children's inconsistencies, albeit often much larger ones as the parents have the edge in experience.