Do you really know that though? If the vast majority of people, including doctors, don't even know the harm they're causing of course they're going to believe they're doing good. But how many are actually being helped? How many would get better without any treatment, or get marginally better at a massive cost that would be better spent improving the lives of the patient's descendants? And most importantly, if the only people able to gather the statistics are the people in the medical industry, how much worse is the problem? Colonoscopies, for example, find far more false positives than actual problems, which leads to chemo which is poisonous to the body and wallet for otherwise healthy people. Many of those people would never show up in these statistics, and everyone involved would go to their grave thinking the doctors saved their loved one from ass cancer.