Dr. Fung gets it right in that different sources of calories engender different metabolic responses.
Dr. Fung gets it wrong when he dismisses energy content, as in calories don’t count, as a parameter.
People are not stupid, OK some people are not stupid, but many people do not think critically, don’t question. Dr. Fung’s simplification of the problem might be somewhat less detrimental then is the CICO misrepresentation, but it is neither beneficent or benign.
Understanding the history of dietary advice over the last several decades, I think people offering dietary advice need to be very careful to be as correct as possible and not to just simplify what is going on because they think the general population is just stupid and will never comprehend the science. The public has been treated like that for decades.
Keto for Life!
Richard