As I said above, with a positive test, work out the numbers for death and other unpleasant outcomes, with or without treatment, and let the patient decide. If those numbers would say not to treat regardless of test results, then don't test.

The study just says that most, not all, cancer screenings don't extend life. And it doesn't say whether doctors are giving patients the numbers I described. I suspect they aren't, which likely means that sometimes they treat even when these numbers would say they shouldn't.