This is absolutely false. Radiation and and platinum-based chemotherapies are still used as a first-line treatment of some cancers, that is true. But there is a HUGE shift into targeted treatments: monoclonal antibodies, oral medicines that attack cancer cell pathways, and immuno-oncology drugs are changing the way oncologists treat patients.
I myself, am a benefactor of the targeted therapy cetuximab, also known as Erbitux. The side effect profile is minimal, and very tolerable. I am over three years cancer-free (HNSCC), and the treatment was considered curative, not palliative.
Yet there is no cure.
Also how mainstream are the treatments that you are talking whwn we are still talking about chemo as a primary treatment. For as much as we have spent on cancer research over the decades WE SHOULD HVE A CURE! And yet we don’t have a cure.