I'm sad to say this but possibly no Seeing the whole picture as a human being? Of course it has to be cured! Seeing the whole picture as a universe or nature observer? No.
Medicine in general has been treating and curing those that, according to natural selection, should have not made it through. It keeps contributing to prolonging human life and therefore to overpopulation. On October 21, 2015 earth population reached 7 billion according to the UN.
I see cancer as a population controlling measure enforced by nature - this and all other diseases. Humans are devouring natural resources, killing wildlife, wiping out forests. Human overpopulation only brings us closer to the end of all things.