Putting everybody in solitary confinement would also prevent persons from gathering in groups and further spreading covid19. Obviously, nobody (so far) is advoc

Putting everybody in solitary confinement would also prevent persons from gathering in groups and further spreading covid19. Obviously, nobody (so far) is advocating this. So you can appreciate the difference between measuring a policy only on single metric of efficiency, and comprehensively weighting overall costs and benefits. Not every efficient policy is legal, moral or acceptable.