Not the OP but it's true that early detection has dramatically improved survival rates for many cancers. Some types now have over 90% five-year survival when caught early. But it's a bit optimistic to say cancer has been cured. Even with early treatment, recurrence is possible - and as the OP alluded to some cancers such as pancreatic, liver, and certain brain cancers still have very poor outcomes. Plus, many of the cancers in the preceding list don’t have routine screening, so they’re often caught late, which makes prognosis poor.