Of course most people are not car mechanics or airline pilots. Most people have jobs where being a "moral idiot," as Crocker puts it, won't kill anyone. Should we really demand that the guy who checks ticket stubs at the movie theater hones his craft?
Well, yes. No job is too low to not warrant care, because no job exists in isolation. Carelessness ripples. It adds friction to the working of the world. To phone it in or run out the clock, regardless of how alone and impotent you might feel in your work, is to commit an especially tragic -- for being so preventable -- brand of public sin.