HN user
For those reading, high dose intravenous vitamin C is used as part of cancer therapies at institutions that provide integrative medicine (chemo + dietary/exercise advice, supplements, and off-label pharmaceuticals).
Here is a paper from one such institution published in a highly respected journal (Breast Journal) that found a significant increase in the median survival rate for women with metastatic breast cancer.
It wouldn't be better necessarily. Generally you want to get the opinions of multiple doctors and do your own research and use your own judgement in evaluating the advice you're getting. The point is that in the face of such enormous complexity the difference between a layperson with a rudimentary understanding of biology and your average doctor is not much. The difference is more pronounced when you're talking about people who are in the very top of their field but those people tend to be quite open minded and curious in my experience. They have such depth of knowledge that they are aware of how little they know.
It's also important to distinguish between technique and knowledge. The difference between a layperson and their surgeon is enormous, a layperson and their doctor, not so much in the grand scheme of things.
I've been able to deal with the years of patients who attended Google Medical School
Run as fast as you can away from doctors and other healthcare providers who think like this. Healthcare providers who have this particular arrogance can create very severe health issues for you and your family with their hubris. There are incredible doctors out there who also have humility when it comes to their own knowledge and will answer your questions and listen to you and take you seriously when you come to them with your own research.
The human body is orders and orders and orders of magnitude more complex than the most elite and advanced human endeavors of engineering. It's almost not even comparable. You have to have extreme humility in the face of such complexity and in the age of Google and open access to medical journals there is just so much to know and so much that is available that any doctor or healthcare provider who would dismiss the value of patients and caretakers doing their own research is really someone who is very dangerous to you and your loved ones.