Medical doctor here. Please don't get health advice from hn comments. As a matter of fact, I advice against reading anything about health on hn, as the risks of dangerous misinformation far outweigh any useful information you might learn here.
Was it that obvious? It would be cool if I could have a theme song. [1] and yeah I don't know how to fix the US health care system.
[1] - https://www.youtube.com/watch?v=BVkTmnJkAN8&list=PLxUfU-CW9j...
HN often suffers from the trait of people who are really bright in one area assuming that that means they are really knowledgeable in areas they don't know much about.
Edit: OK, that's not really a "range". I have no idea why I phrased it like that. Both are very dangerous statements that can be life threatening if the wrong person believes it. I just hope that comment didn't cause any diabetic ketoacidosis cases.
Having a reason doesn't make it any less dangerous though.
We can also relate that some drugs (albeit most are illegal but whatever, it doesn't invalidate them) from recreational to bodybuilding drugs are practically only massively "studied" by the bro-science community and many topic about harm reduction and so-on stems from there, enormous amount of people have started getting interested into health, supplements... due to reading about it randomly from people.
Although, in practice, you are partially right, it also does damage because many people will just take it as face value and just don't have enough expertise yet to do a proper reasoning around some takes and might not check if it's factual.