There is something useful out of Greg's appearance here...more examples of what happens when you have appalling decision making and enough cognitive biases to write a small book about. It's a pity I can't run him through our bank of questions we have developed in my group at work for evaluating decision making styles. We rarely get to see outliers due to the area we select subjects from and most normal people are only shades of grey when it comes to decision making however to see the extremes, is in some sense, refreshing although disturbing when they work in the health field.
Now I think about it, there probably is a book in writing up about the various 'live one's' we occasionally get on this forum and at the Thinking and Drinking meetings.
It must be so different living in such a magical / fantasy world and so, so difficult to escape from, probably like trying to leave a deluded religious cult I imagine, where you were sure you knew your guru had the meaning of life under their belt.
However it's still whack-a-mole as you see the Gregs of life by the truckload at any Mind, Body and Wallet festival.