I think this question can be answered in two ways. The first is that experts, especially in the economic arena, have been woefully wrong as of late. I'm not sure why anyone takes most of mainstream economics seriously anymore, when the majority of them, right or left, but especially right, didn't see the housing crises coming. If you are supposed to be an expert, and you fail miserably in your area of expertise, then your credibility is lost. So experts are hyped up, but don't do any better than the common person in predicting the future, and sometimes are worse.
The second reason, which is not complimentary, is that most people are mediocre. Their thoughts are mediocre, and so are their jobs. They could have fulfilling relationships, but if divorce rates and mental illness are any indication, the average person isn't doing well there either. An ordinary mediocre person does not like admitting that others are smarter than they are, so they place more value on "people like them," rather than the more insightful and clever. This can be seen with climate change and evolution, which have a vast amount of scientific evidence on their side, but are denied by the ordinary religion person because he/she feels like they are privy to special information, e.g. the Bible.
People who have no intellectual conscience, or the ability to think critically, the second description explains partly why they are anti-intellectual. It's a self-defense mechanism. I also want to add that what I mean by smarter is, spending more time thinking about issues in the world, and keeping an open mind, rather than closing their mind and accepting a religious dogmatic interpretation of the world.