to be fair there was nothing to do at the first visit if she was not requiring oxygen. there is nothing that is given to people with covid at home. they either get better or they get worse. perhaps some quarantine may be helpful.
I am not sure why we are testing non-hospitalized patients who have symptoms.
I see your point because symptomatic people should be isolating even if they don't get a positive test. However if the PCR test is negative it might make the doctor more likely to consider whether he needs to pursue other diagnostics?