to me, this is like finding any random "coffee is good/bad for you" of which there are thousands that conflict, and saying "Aha! This particular one shaped the course of humanity for the last half a century due to a major conflict of interest and prestigious publication!"
were there just so many fewer studies in the 1960s? was there further collusion and influence with Congress and the FDA? did the sugar trade group fly airplanes and drop food pyramid pamphlets everywhere letting everyone know liberation was coming?
From your article:
> After the review was published, the debate about sugar and heart disease died down, while low-fat diets gained the endorsement of many health authorities, Dr. Glantz said.
so everyone just went along with it?
well, I've seen bad studies get headlines on Buzzfeed and stick in the collective conscious based on the headline alone, so stranger things have happened