[Eta: also in response to elbows] Idk, out of the dozens of people I know who caught covid, there was only one person who seemed potentially likely to have caught it in a shop (of course, everybody could have caught it in a shop, but it seemed more likely that it happened in their schools, nurseries, ill-ventilated offices and then in the home).
Very different I imagine for supermarket workers, due to the unmasked work in small spaces behind the scenes, the accumulated time spent there and the vast numbers of people they come in contact with.
I had been meaning to ask actually when the Welsh government said (I paraphrase loosely) that there was definite proof of cases acquired in supermarkets, and I was wondering "can we see the data?"
I was wondering if it was something similar to what's been mentioned here - people self-reporting only having been to the supermarket, but forgetting the much closer-to-home, more intimate contacts.
Also, if spread in supermarkets was a big vector, surely cases would stay much higher. But I am not saying it's impossible, of course.
I don't think there's any reason to be deeply saddened about this, I think all of us here exploring this issue are very cautious regardless. (I certainly am going to the shops as little as possible, always well-masked and with as much distance as possible - and always appalled at the people I encounter who are less cautious).
Wrt risk perception, I also think it's the other way round, and I think that is where the danger lies. A lot of people are very wary of the supermarket (many unknown people), but less aware of the risk from people in their immediate family and work colleagues' circle (which is again reflected in what people might report where they might have caught it.)