The efficacy of lockdowns over keeping some things open, wearing masks, and not allowing large gatherings has yet to be quantified or proven. Japan, for example, barely locked down but everyone wore masks, they had a great result. Sweden is now well past it’s peak and it’s per capita death rate is less than Pennsylvania, and on par with Maryland and Ireland, all of which had stay at home orders.
So while some form of social distancing and public health measures lowers the mortality rate , which combination of measures is best has yet to be established with hard evidence.