Cancer has been cured for thousands of years.  Before chemo and surgery cancer existed.  The first thing people did was change their diet.  Many people cured cancer this way.  Some people didn't want to change their diet.  They didn't want to give up the foods they like.  Those people died.  Cancer used to be a rich person's disease.  Poor people had to eat rice and beans.  Rich people can eat meat and drink wine.  Poor people died of old age.  Rich people died of cancer.