If you have a national response to a problem you need to calculate nationally. If you want to be more specific, more specific figures and solutions are appropriate.
The majority of covid-related cases are in hospitals and care homes and mostly defined by age. Therefore improving hospitals and care homes to mitigate this virus, and all other causes of death, makes medical sense, but ordering all the healthy population to self-isolate makes no medical or economic sense and so is vastly disproportionate to the problem, hence why there is a political rather than medical agenda behind the unprecedented restrictions.
But as usual the fake-left are unmasked by their support for austerity on steroids for the many on behalf of the 1%.