It is incorrect and irresponsible to blame people who get cancer for eating badly etc. Sometimes things go wrong at a cellular level and cancer happens.
'A 2006 analysis concluded that “without reductions in smoking, there would have been virtually no reduction in overall cancer mortality in either men or women since the early 1990s.'
Actually mortality rates are at all times high, globally.
However if one looks there has been tremendous progress in some cancers. As an example CML went from a swift death sentence to something approaching a chronic condition.
The standard survival rates are quoted as 5 year survival unless the cancer is particularly aggressive eg pancreatic. The statistics around cancer are very high quality and public in most countries. However, I suspect data will not influence your view.