Let's be honest, medicine is not just conservative for this reason. It's also because of inertia, politics, economics, stereotypes, and the fact people don't want to take the blame if the new thing fail. But also because of resources and human limitation.
I had an example recently in my life. I got malaria years ago because I lived in Mali. The medias, all my friends, family and doctors told me 2 things:
- you gotta take your anti malaria pills (nivaquine, lariam, malarone...) for the whole trip cause there is no curative treatment for malaria
- if you get malaria, it's for life
And surely, when I got back home with the parasite, I got hit with a malaria episode from time to time, to remind me it was here. Not funny.
7 years later, I end up having diner with a scientist from the Pasteur Institute in Paris (pretty much the biology equivalent of NASA, but in France). He calmly explained to me that actually you don't have to take your pills for the whole trip. Malarone is a curative drug, and you can just take it when the first symptoms appear. Also, I don't have to keep having malaria episodes for life: they have protocols, again based on simple Malarone, that can get rid of the little bugger.
I took the number of a colleague of his, a tropical disease specialist, and went to the institute. Surprise, everything is true. There is no mystery. No secret.
The information is just there. Scientifically robust. And yet it doesn't reach you.
So now you gotta wonder: what are the other thousands missing informations or misinformations you get every day in medicine ?
And remember how many food facts fad you lived through. Remember that companies spent a lot of money for stuff like "carots are good for sight", "drink milk to grow up", etc. Remember that red meat is considered "Group 1, carcinogenic to humans" by WHO and nobody is talking about it. Remember that it took decades between asbestos being marked as deadly and any move to forbid it.
We need to keep a healthy criticism about medicine. Doctors, after all, are only human.