1. Should we measure the impact of lockdowns on other types of deaths or adverse effects? Suicide, drug overdose, alcohol, the effects on children social learning? There will be adverse tertiary effects of lockdowns that we won't be able to measure for a few years.
2. The rate spread could have been much faster, leading us to Omicron, a mild variant with little impact.
3. Lockdowns brought economic/financial hardship on many people. Stimulus efforts provided little for those whose livelihood was impacted by government decisions.
Your focus is on the healthcare system, but the economy is an extensively complex system that has been significantly impacted. Sure the report was released out of John Hopkins, but the authors knew it would reach a larger audience than released under the Cato Institute. These studies and findings are to enable discussion about future policy decisions.