Not everyone is qualified to teach their own child. 

Staunch homeschooling advocates will answer the question, "Are you qualified to teach your own child?" with an unequivocable YES. 

YES. Simply by being a child's parent gives you the qualifications to educate them yourself at home. Parents do the very best they can, and by the grace of God any educational gaps  melt away. Anyone can homeschool their own child. 

Flip the coin.