Haven't there been fairly significant advances in using specialized chemotherapies for specific forms of cancer? This at least has been my impression from a few books I've read.
More or less correct, the parent comment is nonsense. There are multiple special types of cancer that can be specifically targeted now (for example CML), though few of those are chemotherapies aside some improved targeting mechanisms via antibodies. Also, prognosis accuracy has and is improving dramatically. And there are HPV vaccinations now, targetted virus treatments comming up and so much more. Immunotherapies are great but not the first and only thing in 25 years.