It can be a real problem though in aggregate, and is an issue that pops up with aggressive screening. Cancer treatment isn't exactly a walk in the park and bri

It can be a real problem though in aggregate, and is an issue that pops up with aggressive screening. Cancer treatment isn't exactly a walk in the park and brings its own health issues with it. Further, it can be hard to impossible to give an accurate answer to "am I going to die from this or with it?". So you find out you have cancer, and now you treat it. And if it was never going to be a big deal, you're likely worse off than if you had left it alone. At the individual level what you say is true. But at population scale it is easy to make the case that early detection causes more harm than good.