It's fun to speculate but to prove your case and make a real dent in human health problems is a lot harder than coming in late and saying "But wait, why don't you just..."
I heartily recommend going back to the great textbooks of these fields and reading them, rather than trying to understand things by dropping into the state of the art research (which is usually wrong, and hard to understand in detail).
Some books I recommend: The Biology of Cancer (Weinberg). After you read this book you'll have a better understanding of why doctors and scientists cringe when people say "cure cancer".
Molecular Biology the Cell (Alberts, etc). After you read this book you'll have a much better understanding of the full complexity that scientists have to deal with in complex cellular systems.
Molecular Biology of the Gene (watson, etc). Can't say much about this book except that's it's a classic reference.
What makes these three books exception is that they support all their factual claims with direct links to the papers that established the facts. And they provide you with the skills to evaluate modern research. But nothing compares to actually going to grad school and participating in the research- once you see how the grants are made, the experiments are, and the papers are written, you'll understand why trying to understand biology by press release is like trying to understand assembly language by watching a Steve Jobs product announcement.