>>12301023Chemotherapy is basically a shotgun blast: you're feeding the patient poison in the hopes that you'll kill the cancer cells before you kill the patient.
Surgery isn't always possible because there are things you can't just cut out. There are also things you can't get to, like deep in the brain.
Also it's not always some tumor that's all one piece. If the cancer metasticizes, then it's all over the body -- and usualy it's all over for the patient, too.