I think that is pretty intuitive though - a day in surgery is almost always more risky than a day being sick without a surgery, because you are taking on some s

I think that is pretty intuitive though - a day in surgery is almost always more risky than a day being sick without a surgery, because you are taking on some short term risk in exchange for reducing long term risk. That doesn't mean the surgeries are unnecessary, just that the risk is distributed differently.