This is all hypoheticals, it means very little.

Here's more hypothetical imagining: I have never heard any academic talk about a cure for cancer. I don't know how such a secret could ever stay secret in such a large community when the prestige and moral smugness of any individual that spreads it, even secretly, would be immense. I can also imagine world leaders have regular cancer screenings and tend to catch it early, but I also don't know the average age of cancer deaths and rates of remission, rates of world leaders. It could be believable that they survive for these reasons, I imagine.

Now we've both imagined reasons for why and why not a cancer cure would remain secret.

What about the facts? Cancer is scientifically caused by a whole bunch of different things, and is very complex. We are still publishing new research (leading world class research) on understanding the mechanisms, and confused and scratching our heads in many cases. Labs worldwide basically burn money to research this. Biochemistry is a bitch and a half to understand, and another bitch and a half to develop technology for.

In order to believe "a cure for cancer" only available secretly to the elites exists and is being withheld for commercial reasons, I want a source, not hypotheticals. What is the name of the cure? How does it work? Prove it or no one will believe it exists.