6. You don't need allopathic medicine
I don't talk about this a lot, but my mother had schizophrenia. She had to take powerful antipsychotics in order to have any semblance of a normal life. I had relatives who would suggest that she didn't need to be medicated, and that in fact it was the medication itself that had caused her mental illness! But I've seen her off her meds, and she was simply not the same person. Haloperidol allowed her to connect with people and freed her from terrifying hallucinations and delusions. It allowed her to be my mother.
I've known people who needed allopathic medication to keep their hearts going, to manage their diabetes, even to digest food. There are people who can only stay alive because of CPAP machines, colostomies, or shunts. I'll try an herbal remedy if I have a cold or a headache, sure. But when I couldn't keep liquids down and was running a 104F fever that turned out to be caused by a kidney infection complicated by sepsis, you better believe I went to an ER for some antibiotics and a saline drip. I've seen people actively discourage friends from going to the hospital to get checked out when they had symptoms that could point to something life-threatening. That's dangerous and irresponsible.
7. You wouldn't be ill if you went on x diet
If a person asks for suggestions on how to manage their illness, it's perfectly fine to mention that you've heard a specific diet might help. But I've seen people claim that if a person refuses to go on a raw-vegan or gluten-free diet, they are to blame for being sick and deserve no sympathy. As heartless and rude as this is, it's also factually questionable. If anyone had found a 100% effective, works-for-everyone cure for diabetes or cancer, they'd have a Nobel Prize. I know not every treatment option has been empirically studied and that "big pharma" exerts some influence over this, and I'm willing to accept that there are "alternative" treatments out there that could bring people some needed relief. But when people start blaming the victim for being sick in the first place, I stop listening.