MILAN — Industry executives gathered in Milan at the Four Seasons Hotel on Thursday at the RLC Fashion Summit. Titled “The Shape of Influence,” the event set the scene to map the forces reshaping fashion and luxury. And one takeaway was that it is a highly volatile industry. “One should never have assumptions. Fashion is unpredictable by its very nature. If it were predictable, it wouldn’t be fashion,” said John Hooks, adviser and board member at Armani Group.