Toxiic, you're taking 1 or 2 peoples opinions and making it seem like its fact. In their opinion we are nowhere near a cure to cancer. But lets be real for a second - they have no idea. The people you are speaking with are night highly touted researchers who actually know. And we understand what cancer is, we just don't have a guaranteed cure to it.
You can't say our knowledge is small without discovering more. You're ASSUMING there's more to the universe, and we know a small amount. That's a hypothesis. Prove it? The undiscovered doesn't imply we don't know it. We have theories that have no been falsified, and they claim we do know a lot about the world. You ignore what we do know about the world, which is a lot, and assume there is greater unknown.
And your stuff about biology, you pretty much just said "I have a first year university understanding of biology, and talked to some people in the medical profession" -- That is soooo little. Health canada is a joke, and university professors are just opinionated and explain their opinion. And you've got such a minor understanding. First year biology at university is entry level, generics about everything. They don't put detail. You haven't learned a thing about biology, so stop speaking as if you know stuff.