some cancer can be cured.
There are many people who have survived after treatment for lymphoma, breast cancer, prostate cancer, colon cancer and on and on.
People are cured from cancer all the time! Sometimes it's a simple matter of cutting the cancer out, sometimes it takes chemotherapy and radiation.
Some forms of cancer are almost always fatal like pancreatic cancer.
There are hundreds of types of cancer, some can be cured some can't.
HIV/AIDS can't be cured but there's effective treatment so it's not the certain death sentance that it was in the past.