The issue is that testing often comes with its own health costs and many tests return a fairly high rate of false positives, which in turn leads to surgeries th

The issue is that testing often comes with its own health costs and many tests return a fairly high rate of false positives, which in turn leads to surgeries that can take a high toll on the body. Related to this, I recall reading about a study of elderly men with slow growing prostate cancer. Having surgery to remove the cancer did decrease the chance of dying from prostate cancer, but actually reduced their overall life expectancy. Prostate cancer surgery is hard on the body and an older person with a slow moving cancer has a pretty good chance of dying from some other cause before the cancer gets them.