I would suggest that Dr Fungās bookings (so far into the future) are because there are so many people that are desperate to lose weight and get control of their metabolic disease. They are holding out hope that his program will help them. Lots of people seem not to be able to do it on their own. Maybe because it is vehemently opposed by the medical establishment and society in general.
I have not listened to the most recent ketodudes so not sure what the 'journal, journal, journal comment means. Perhaps you would be kind enough to elaborate?