What are you talking about?!? He's not some random dude, he's a specialist and professor, at UCSF:
https://pediatrics.ucsf.edu/people/robert-lustig>sugar is addictive
>>The evidence supports the hypothesis that under certain circumstances rats can become sugar dependent. This may translate to some human conditions as suggested by the literature on eating disorders and obesity.
https://pmc.ncbi.nlm.nih.gov/articles/PMC2235907/
>that fiber somehow mitigates the absorption of fructose
>>Dietary fiber (DF), especially viscous DF, can contribute to a reduction in the glycemic response resulting from the consumption of carbohydrate-rich foods.
https://pmc.ncbi.nlm.nih.gov/articles/PMC9736284/
>that calorie restriction does not cause weight loss
>>Mechanisms smooth out the large day-to-day differences in energy consumption, decreasing the importance of the size of a meal. In the short term a reduction in energy intake is counteracted by mechanisms that reduce metabolic rate and increase calorie intake, ensuring the regaining of lost weight.
https://pmc.ncbi.nlm.nih.gov/articles/PMC5639963/
I'm not going to go on and on... UCSF, which is one of the most respected teaching hospitals in the country, isn't hiring cranks. He specialize in exactly this stuff. Yea, he's a bit more strident than would would expect from a scientist, yes, he deals with the extremes of childhood obesity, which isn't really relevant to most people's bodies, but christ, he's not a crank.