Paywalled article so I can't read it but I'll say this.
Cancer isn't 1 disease. Cancer is a much broader disease. There is no cure for 'cancer'. "Cure for cancer" is similar to saying "curing respiratory illness".
Your body is constantly making cancer cells and destroying them your whole life.
I'm not sure how a "master switch" plays into this whole scenario because I can't read the article but the article title seems misleading.