I think you read a lot into what was a very simplified description of what these tests may look like in the future. It will be a handful of years before Stage 1

I think you read a lot into what was a very simplified description of what these tests may look like in the future. It will be a handful of years before Stage 1 blood tests are performed on anyone in a non-experimental fashion, and probably over a decade before being used at any sort of scale. Currently, for many people with some sort of mild long-term condition, their doctors will order bloodwork every year or every other year, building up a history for that patient so that when there's suddenly a deviation, it can be noticed. This will be similar. Once the tests are cheap and ubiquitous enough, checking for mutations at sites associated with cancer to see if someone may be developing cancer, will be equivalent to how currently we check for bilirubin levels to see if someone may be suffering from liver disease. And it will be dealt with similarly- with follow-ups, additional tests that are more sensitive/specific, and examination of possible problem sites. We haven't flooded hospitals with false diagnoses of liver or kidney diseases that are detected by traditional bloodwork.