How many parents are proficient in all the subjects a growing child needs to be educated in? Mathematics, literature, language apart from the literature, biology, chemistry, art, music, civics, philosophy, etc.etc. A parent needs to understand and be able to explain all those subjects to their child in an understandable, approachable manner. Teachers are professional pedagogues, they are taught how to present information to children of different ages with different needs. How many parents are proficient in that? Some probably are, but I highly doubt the majority of them are.