Here’s the thing.
Suppose Bob, a lone inventor working in his garage, discovers a cure for cancer. Except, what does that mean? He’s got some sort of treatment, and he thinks it will cure cancer. But the $100,000,000,000 question is, how does he know?
What EVIDENCE does Bob has that his treatment cures cancer? He gave it to some cancerous mice, and the cancer went away? Fine, except how does it work on humans? What side effects did it have on the mice? He had cancer, he tried the treatment on himself, and the cancer went away? Except lots of people get better from cancer. How does he prove that his treatment is what made his cancer go away?
In order for Bob to even make the claim that he has a cure for cancer, he has to conduct clinical trials on humans. You can’t do that in your basement. So by definition no lone inventor can invent a cure for cancer, all they can do is invent a promising treatment that MIGHT work against cancer. Or maybe not. He can call up the hospitals and the pharma companies, but why should they treat him any differently than the thousands of quacks?
And importantly, why should Bob treat HIMSELF any differently than the thousands of other quacks? He’s got a promising line of treatment, but any scientist or doctor knows that promising lines of treatment are a dime a dozen, and there are plenty of treatments that seemed to work in animal trials or in vitro that don’t provide results better than placebo in clinical trials. Without those trials, Bob should know that he doesn’t have a god-damn thing, and Bob should know better than to imagine he has a cure for cancer. Bob should be able to look at his evidence, and conclude that no sane person would claim to have a cure for cancer based on that evidence.
Only a quack would feed grapefruit seeds to someone with cancer, watch as the person’s cancer goes into remission, conclude that grapefruit seeds are a cure for cancer, and start calling up the Mayo Clinic. This is what quacks do every day, that’s what makes them quacks. Bob can’t go beyond the quack level in his garage, he absolutely HAS to conduct clinical trials at a hospital, otherwise he’s just fooling himself, the history of medicine is absolutely stuffed full of practitioners who fooled themselves that their treatments worked.