The problem with your analysis is that you're not considering just how much "loss" we were averting via lockdowns. Do you think those negative effects of our partial lockdowns outweigh 5X more COVID casualties, including many from preventable deaths that have nothing to do with COVID? We need a functional healthcare system, we could not allow it to become overwhelmed and collapse. There's also the ethical issue of allowing a disease to run rampant and ravage our elderly population - could we recover morally and ethically if we allowed 100's of thousands of older folks to die long, painful deaths so our economy was a tad stronger?