Let’s just assume for sake of argument that that is true, more data is always better. And let’s assume collecting more data is not cost prohibitive on a populat

Let’s just assume for sake of argument that that is true, more data is always better. And let’s assume collecting more data is not cost prohibitive on a population scale. In the real world, physicians have a major incentive to practice defensive medicine to avoid litigation. If you order an unnecessary test and it shows something abnormal, even though in your clinical judgement it is not likely to be worrisome, you now feel a strong impulse to spend thousands more dollars to completely rule out it’s not some 1 in a million rare cancer lest you get sued. So some systemic issues at play here, not that “doctors are idiots.” In data science, sure more data is always better but you’re not worried that more data is going to lead you to a traumatizing malpractice lawsuit.