More anecdotally there really seems to be a problem with many 'shoulds' involved in childhood care.

I have a good friend who was given contradictory instructions by health care professionals while they were still at the hospital with their child which developed into a situation where 'professionals' were chastising the parents for following instructions correctly.

This is a real bind for parents who don't have easy access to second opinions or are in a position where the health professionals misuse their position of authority to prevent discussion of situations.