There has been plenty of photos and reports from Spain and Italy of overflowing hospitals and multiple truckloads of coffins. You're obviously not lookingAt least a portion of people calling for shutdowns are doing so out of malice for national economies. Despite reports in various anti-social and socialized media, there have been no pictures of overflowing hospital rooms with patients on ventilators in the press from any country, no photos of dead bodies stacked atop each other at "crematoriums running 24/7" related to this virus. All the celebrities claiming to have the virus are posting selfies of themselves isolating, not pictures of their lab test results.
Those who feel they are at risk should certainly isolate themselves, but even with low testing numbers it is clear only a small percentage of those who get the virus require any medical care at all. Companies staying open during this time are performing a valuable service and taking on a calculated risk in the face of statistics they can observe. If they are wrong about the safety of their employees, they know they will be held liable.