As someone with an education in healthcare, nothing goes off the rails, and I mean really off the rails like a health related thread on HN.

You get some of the most ardent believers in some of the wildest hypotheses who are quick to dismiss a century or more of actual data.

That’s not to say that some early hypotheses won’t turn out to be correct, but there is a big difference between “I read this interesting paper with an interesting hypothesis” and “Hey guys, all of current medicine is 100% wrong and your doctor is conspiring to keep the truth from you (or so inept they probably can’t tie their own shoe).”