Don’t be dismissive of these concerns, they are very real.
We can and should essentially shut down the country
I don't think we can make such a blanket assertion. The US markets have lost 10T in value over the past month. If the virus infects 70% of the US population with a 2% mortality rate, 4.2M ppl will die. It's obviously not so simple, but we're sacrificing $2.4M in market cap per life saved. At some point, the tradeoff makes no sense in light of the fact that we could invest in life saving technologies/solutions that save more lives down the road.
Even doubling that does not "destroy everything"
So if it was as simple as you say, then sure. Let's shut it all down. But shutting it all down is not going to save us from Covid19.
Plus when hospitals get overloaded, patients needing critical care for problems other than covid-19 will die as well.
https://www.imperial.ac.uk/news/196234/covid19-imperial-rese...