Especially something that is so drastically over represented in the sick, old, and obese but not the young and healthy. Why is it justified to shoot healthy strong young people, privileging the interests of the comorbid group? In a situation where again, they're going to get sick anyways? What if we just shot the old and fat people and then everyone could stop worrying about covid?
To answer you, who knows, but much much much higher than 0.2% death rate for under 50's etc.
I think what China's doing is wrong and foolish, but maybe their citizens like being locked in their apartments for such a trivial disease, who knows?
In the actual circumstance in the real world, animals would need to be culled because it passes between deer and cats and humans. Maybe we start shooting cats and deer now? No more pet cats.
Lets say another virus is discovered tomorrow, how high would the mortality have to be before you were to accept all those effects you list?
And lastly, how high would it have to be before you would accept actually shooting people who violated quarantine procedures? With the understanding that a statement like never, could mean the extinction of humanity (a valid choice I guess).