I can understand your point of view. Here are my thoughts.
I realize this woman was a crackpot. However, my KH was comprised of mostly crackpots like this woman. The other thing to consider is that silence is an endorsement. She should have been corrected & made to apologize to me, but instead the reaction was that children should respect all adults no matter how inappropriately they behave.
I was not a person to not listen to suggestions. To the contrary, I was searching for a solution. At a certain point, my research taught me what would help my condition and what wouldn't. I literally spent hours every day bleeding--in school, at home, walking to school, at the mall--in many places. I had physician's office visits several times per week and emergency room visits several times per month. I knew what caused my nosebleeds and the best way to stop them. By virtue of my experience, I was an expert on my condition & knew a lot more than a random person in a KH bathroom ever would. So did my parents.
I realize ppl want to help and offer their unwanted/unsolicited advice....however, it is idiotic to believe you know more about how to treat a rare condition than the person who struggles with it for hours daily, and their entire medical team. There is a difference between saying, "My friend has nosebleeds & says such and such helps....", offering assistance and then leaving (appropriate) VS. insisting someone take your bizarre suggestions and criticizing your relationship with God if you don't (inappropriate).
For example, there were a few ppl in my KH that insisted all I had to do to stop my nosebleeds was to tip my head back, and they actually took my head and forced it back if I declined. Far from appropriate or helpful! All that does is make the blood go down your throat--it does nothing at all to affect the bleed, and in fact made me sick to my stomach after hours of....well I'll leave it at that (gross). I thought I'd be executed by Jehovah for drinking blood. My mother was present in the KH. They had no business taking over decision-making for someone else's child! Yet the silence endorsed their actions.
I find it highly arrogant that these ppl would think their selection of a random vitamin outsmarted medical science, the patient, and their family. My non-JW parent & a grandparent had the same condition I do, so it is not as if I had no adult direction in this matter either. That was well-known in the congregation. Today, I usually do the polite, "uh huh," and just go on about my business, but the JWs in my KH couldn't leave it at that. They insisted their suggestions be taken no matter how dangerous or stupid--and the "cures" were all supposed to be taken to replace medical care, not as an adjunct.
Then there was the outrageous method of "diagnosing" me. There were a few women who would tell me every freaking time, "it's just your sinuses, take some cold medicine". Aaaargh! I wanted to say, "So you came to this conclusion while peeing in the toilet next to me for 90 seconds? You must be right; I'll just ignore the doctors I see every freaking week for this condition and listen to you." How many dozen times does a person have to tell me that before I'm allowed to get aggravated?
(The cold medicine they wanted to give me would have made it worse BTW.)
My whole impression of my KH's view of medical care is that physicians are idiots and liars, and all they need to do is to rely upon rumors, hocus-pocus, and guesswork to outsmart physicians. That is because they've been taught that for over a century: Brochure: Bizarre Medical Myths--Believe it or not! The reason I now jump on alternative medicine suggestions to cure my bleeding disorder is that they are intended to perpetuate the WTS myth that use of blood products is never necessary. I think it's important to debunk those suggestions to ensure the medical misrepresentations the WTS has perpetrated over the centuries does not go unnoticed.