Spend money on delaying and turning away and losing business from people* who unexpectedly find themselves to test positive, even though that will not prevent a

Spend money on delaying and turning away and losing business from people* who unexpectedly find themselves to test positive, even though that will not prevent all (possibly most) transmission risk on site? *Many of them would blame the restarurant, or indeed vilify it as an matter of reflexive politics?