They make too much money "treating' it than they could if they would find the cure.
What would the Susan Komen breast cancer fund raisers do? They raise millions of dollars each year for cancer research. What will they do when there is a cure and we no longer need to raise money for research to cure it? All the doctors/technicians involved in chemotherapy, radiation, and surgery. PET scans and x-rays. Not to mention the expensive and many drugs for the treatment. Everybody has a piece of this.
Why cure it when you can make a living treating it? Job security...
It would be nice to see them find a cure. Cancer is a bad disease and kills many people. I've lost family members to it.