It is possible to be a single-issue voter for policies that benefit cancer survivors.
I live in France, where all chronic diseases are treated for free - and well. I have prostate cancer that's spread to my bones. Just the taxi the state provided for my trip to the oncology unit for radiotherapy cost the state 4000 euros. My current pills cost the state 3000 euros per month and my six monthly hormone injection 500 euros every six months. Obviously my chemotherapy cost me nothing.
I find it disgusting that the richest country in the world cannot provide free medical care to its citizens.