I get what you're saying, but realize many people will go without wages in these scenarios, so that has to be accounted for. Also, I've seen experts warn that however long things are shut down, once this is ended, the spread will continue. There's no conceivable span of time things will be "shut down" such that the disease will completely stop spreading.

All this to say, yes, of course shut downs must occur to stop acute problems in healthcare systems and try best to protect elderly. And this should absolutely be prioritized over financial markets (though risks here still matter). But it is going to spread.