“Johnny! Johnny!! Johnny!!! Johnny Depp!!!!” The celebrity dutifully signed autographs for his followers on the red carpet for the premiere of Jeanne du Barry, director Maiwenn’s Cannes Film Festival opener. And let’s call him that “c” word, because to call him an actor in the true sense of the profession is an insult to thespians who toil on stage and screen for little gain. Judi Dench lamented once that, in the UK at least, roughly 5 percent of the actors make big bucks. The rest live hand-to-mouth, often doing two, three or more jobs to make ends meet. So forgive...