Understood; these are the failure modes of cheap, weak tests in a system designed for expensive, high signal tests. I get that it is causing a real pain when these are introduced willy-nilly -- so is there a way for the medical system to evolve into making productive use of such signals?

Because the status quo is not working for a lot of folks in managing their own health, and just saying "it has to be this way" --while every other aspect of their life takes advantage of a wider range of options -- leaves them careening into MAHA style crazyness .