> Continuing a lockwdown while the number of positive covid cases remains in the low hundreds and the daily death rate in the lower tens to single digits.

Correction - thousands, not hundreds. But comparison to the previous numbers is required, because it's approaching the peak we've seen. So close to highest ever, rather than something to be dismissed.

> Serious cannot leave your house outside and go outside for a jog … because there are 50 positive cases in a nation of millions ?

... You can still do that. There are several allowed reasons to leave your house, and exercise is one of those, and always has been.