Why should anyone be forced to shield?

The best way (and with politicians sometimes the only way) to know whether people are aware they’ve made a mistake is seldom to put that question point-blank. A reflexive ‘oh no I didn’t’ kicks in. Do you honestly think, for example, that government ministers are privately confident that as Covid-19 swept the country, hospitals were right to send elderly patients back untested to care homes, even with the limitations to our knowledge at the time? Of course not.