Aside, it is really a shame how reductionist the popular view of nutrition is that we come to scapegoating "fat" or "sugar". T. Colin Campbell says it well:
This is reductionist experimentation that encourages the development of out-of-context remedies targeted to one risk factor or one causal event at a time, a recipe for failure. Reductionist experimentation is valuable for understanding nutrient structure and function, but it too often encourages endless speculation and confusion caused by highly subjective, personal preferences as to which factor to favor in research and to offer to the market.
https://nutritionstudies.org/fallacious-faulty-foolish-discu...