Tell that to the husband and children who lose3 their wife/mother to breast or ovarian cancer, who had a great diet all of her life, exercised, never had an abortion and was a virgin at the time of her marriage ( and yes, such people DO indeed exist! )and neither drank nor smoked and never did any illicit substance.
You can do EVERYTHING that you imagine will stave off cancer; however, if you are a man, at the age of 50, 5 out of 10 men will get prostate cancer, at 60, 6 out of 10, at 70, 7 out of 10, at 80, 8 out of 10, at 90, 9 out of 10 men WILL get it. Fortunately if caught early enough, this is THE most survivable cancer their is.
What the bleeding hell do Doctorates in Philosophy ( that's what a PHD is; diddums ) know about cancer and it's treatments and/or preventions?
And just WHY do YOU imagine that YOU are an "expert" re all types of cancers?
Your "way" is the way of "faddists" and utter MORONS, who believe that they are smarter than everyone else, which is delusional in the extreme!
Doctoral programs in Molecular Oncology and Tumor Immunology and Cancer Biology are quite common. You strike me as an ignoramus.