The movie “Spotlight” packed an emotional wallop with ink-stained journalists because of its expert depiction of how we think, work and even dress (too quickly). To most moviegoers, it was a detective story about the tawdry corruption of a powerful religion. To newsrooms, it was about us. It opened with a scene that’s become all too familiar in newsrooms: the ceremonial cake, jokes and remembrances for a departing journalist (who probably won’t be replaced).