> That doesn't seem like enough to entirely shape worldwide discourse around nutrition and sugar.

IDK, see the "BLOTS ON A FIELD?" by Science ("A neuroscience image sleuth finds signs of fabrication in scores of Alzheimer’s articles, threatening a reigning theory of the disease") or "The 60-Year-Old Scientific Screwup That Helped COVID Kill" by Wired (regarding the anti-scientific refusal to acknowledge it as airborne) for a couple of recent examples. Once underlying assumptions stop getting questioned, I think anything is at least possible.