Wessley strikes me as someone with a deep understanding of how other people think about things -- that's how he manages to thread the needle so well when gauging his audience. What I hear from people who have spoken to him personally is that even people who are really against his way of thinking come away from the conversation feeling a bit hypnotized, saying he presented his arguments in a way that is compelling while being so charming that one feels a heel to disagree. They still don't believe in his theories, but he manages to change their impression of him. It goes to show that one can have remarkable interpersonal intelligence while still having little logical reasoning ability -- and/or relying on audience bias to find support for a theory, rather than relying on painstakingly-gathered data.
Oftentimes when I begin to think people are stupid or ignorant, I'm actually aiming for a very different end goal than they are. When you have very different goals, the other person's actions can seem foolish, stupid, or even nonsensical.
In a way, Wessley's talks -- and papers -- are more about playing to the audience than anything else. And if he receives his applause, as far as he's concerned, he's done good work. And with this goal in mind -- rather than helping patients -- he has risen far.