It depends on the denominator. There is no free lunch. If there is an estimate for death prevention, what is the estimated cost in lives?

Given that death is a certainty for all, how many lost person-days do the 50k deaths represent? Since the lock down means no normal activities such as routine doctor visits, how many person-days would be lost due to undetected illness or delayed treatment?

Staying locked in is a strategy for preventing excess deaths from overwhelming a health system. It isn't a long term strategy for eliminating all virus related death.