Not only are there many extremely intelligent ordinary people out there, but a lot of famous, mainstream journalists and commentators get by mainly on their rhetorical skill and lack both analytical ability and common sense.
UPDATE: Mitch raised the hair issue in the comments, and I realized that I didn’t mean to restrict what I wrote to mainstream-media people. Andrew Sullivan (not to pick on him but he’s an obvious example) fits the pattern, despite not being a MSM person and not having important hair. He writes beautifully but his analysis of matters economic (deficits bad!) and geopolitical (we’re losing!) is somewhat less acute than is his rhetoric. Some people simply write better than they think. We should always examine arguments carefully, no matter who made them or how satisfying they sound.