How does that differ from what we ALWAYS do when it comes to flu epidemics. You come down with the flu...you stay home from work and try to avoid contact with friends and family. How does a test kit help in any way? You know you've got the flu. You don't need to be a doctor to know that.
Initally, if we'd been able to isolate original cases, we might have been able to contain it. Probably not, imo. But because with the "normal" flu, we have roughly half the population vaccinated, it won't spread as "well."
At this point, you're probably right that the general population will get what it will get. But we're not even testing the docs and nurses and cops and firefighters. If we identied the positive caregivers, they could be isolated until they get well. Now we most likely have infected people checking on people who may not yet be infected.
But the proof in the pudding will be if we end up with 30k-60k seriously ill people, in addition to all the people in nursing homes and hosptials, will we have the caregivers healthy? And would testing have protected the critical workers? We'll see.