People may close the economy of their own will if they feel unsafe. You need to assure people that the situation is under control --> hence you may actually need to suppress the virus; in which case the 'test/trace/isolate + masks in public' approach may be the way to go (= there's a better grasp of where the virus is + masks ease the nerves in case of also asymptomatic spreading). Additionally there are still plenty of unknowns over what the virus does to the body, and the after-effects; something that will cause unrest in people's minds. Wonder what the numbers are for some other businesses (like restaurants e.g.)...
edit. To add, people in S. Korea get a feeling of safety not only from the heavy usage of masks, but also from the way their tracing system has been set up; to notify whenever they are near places that people found to have been infected have recently visited. Increased assurance that an infection is unlikely to occur.