Brent Lang Executive Editor With “Pain Hustlers,” David Yates was ready to exchange Hogwarts for strip-mall medical offices. It was time for the British director behind many of the Harry Potter films and the “Fantastic Beasts and Where to Find Them” series to leave magic behind for a grittier look at muggledom. “Having spent such a long time making films about wizards, I wanted to do a film in the real world and a social-issue driven, but one that wasn’t too earnest and serious,” Yates says a week before the Netflix release debuts at this year’s Toronto Film Festival.