Even if “most” cancers are genetic (do you have a source on that?) they absolutely can be prevented. For example, people with a family history of colon cancer c

Even if “most” cancers are genetic (do you have a source on that?) they absolutely can be prevented. For example, people with a family history of colon cancer can get colonoscopy screenings to check for polyps. Same goes for people with BRCA2, etc. And environmental factors play a gigantic role in the prevalence of cancer today.