The cold hard truth
COVID-19 is killing primarily people over 70 years old or those who have acompromised immune system or chronic medical condition such as diabetes, obesity or hypertension. It will keep killing these people until herd immunity is achieved naturally or through vaccination.
Since we know the medical profile of most of the victims of covid-19, the plan of action is quite simple. Quarantine, isolate and protect this smaller segment of the population as opposed to quarantining, lockdown, whatever you want to call it, the entire population. The sooner herd immunity is reached, potentially the fewer deaths there will be.