Is the “entire” economy really shut down? Or are you politicizing and extrapolating? There is no playbook for this, the premise you propose is that if we just let people get sick and die then the economy will be “fine”. That’s not proven, it’s an agenda driven assumption. I don’t have the answers, but considering almost the entirety of the world is taking measures there probably a pretty damn good reason. Does that mean the response isn’t overkill? Not at all, it very well may be. Economics nor population health are exact sciences, we can’t replay the situation again and figure out who would do better.
Each side is making mistakes, humans are imperfect. The choice has been to protect life in hopes it gives us the best overall outcome from a human standpoint and an economic standpoint.