> Luckily there are fewer and fewer conditions that truly lack available treatments. A significant proportion of autoimmune and neurodegenerative disorders are

> Luckily there are fewer and fewer conditions that truly lack available treatments. A significant proportion of autoimmune and neurodegenerative disorders are still very untreatable. And casting (reasonably balanced) diets as preventative is almost always useful for anything that isn't a genetic certainty. I strongly disagree with your counterexample. MS, for example, is strongly correlated with environmental exposure [0]. Your diet is a constant and cumulative source of environmental exposure if you're eating normal American food all the time (pesticides, genotoxic compounds in processed foods [1], carcinogenic fats, hormones, and dense refined carb spikes with little fiber). Eating healthy is absolutely useful advice if you have some familial risk of M.S. Worst case? You get it anyways, but are healthier overall. [0] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6444694/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6444694/ [1] https://pubmed.ncbi.nlm.nih.gov/15914214/ https://pubmed.ncbi.nlm.nih.gov/15914214/