Are experts often wrong? Sometimes? And, if wrong, why and how?

For a few weeks, I have been reading reviews of the book Wrong: Why experts* keep failing us--and how to know when not to trust them *Scientists, finance wizards, doctors, relationship gurus, celebrity CEOs, ... consultants, health officials and more by David Freedman. I chose not to purchase it, but ordered Wrong from the library; I am number nine on...