Why would anyone be concerned about their children pursuing 'magik' unless they feared that it was real??

In a similiar sense, you'd only worry about your children hunting fairies at the bottom of the garden if you were concerned that they may eventually find them.

I think I can say without fear of serious contradiction, magik is make believe. There isn't really a place called Hogwarts, magik wands are just bits of wood and broomsticks will never compete with Qatar Airways in the commercial aviation sector.