That's close to what I got out of the book. From Riniolo's citing of research indicating that groups that might be
presumed to exhibit more consistent critical thinking did not, and from the tales he told on himself, I also think that he sends a "we're all in this together" message. But yes, as a teacher of the skeptical method, he does clearly believe that we all, regardless of our education or occupation, can become better at detouring around our biases and at the same time be humble about the inevitability that we won't always be able to do it.