All the best supermodels have fairytale origin stories. They are bullied at school: too tall, too flat-chested, too strange-looking. Boys prefer their more comely peers. They grow up believing themselves to be unlovable, even social outcasts. And then an outsider swoops in – perhaps at an airport (Kate Moss), in Primark (Jourdan Dunn), or McDonald’s (Gisele Bündchen). The scout plucks them from...