I haven't read all of this but I'll relate my experience and views.
I spent an hour yesterday in a supermarket. I'd gathered my four or five items (of which I was in considerable need) and didn't get the other twenty or so that I also needed because of the utter lunacy of some of my fellow shoppers over the past week or so. During that hour, for most of the time I was queuing in a shopping aisle. Whilst I was there I was jostled, bumped into and was generally close up and personal to a number of people. There was nothing malicious in that. It's just that there was no space for anybody to do otherwise. On my way home I called in my local for a coffee (I needed it). I sat at a table which was four or five feet away from the next one and despite being reasonably busy, nobody was in anybody else's face. There was a notice asking people not to gather round the bar and to respect other people's space. This was by and large complied with. I washed by hands before I went to the bar and I used sanitizer after I had ordered.
I stood a far greater chance of catching or passing on a virus during my time in the supermarket than I ever would have whilst having a coffee in the pub. So, until "the authorities" find a way for me to get my goods without enduring what I did yesterday I shall continue to frequent my local unless and until it is closed on government orders. I plan to visit on Sunday evening with Mrs NJ and expect a similar situation to prevail (it is never busy on Sundays and I imagine it will be even less so now). If I eat at home on Sunday I shall have to make another shopping trip to get the victuals and since the threat of cross contamination there is far greater than in the pub I'll be doing everybody a favour. The alternative, of course, is simply that I go down with malnutrition because, thanks to idiots who clear the shelves and freezers of anything they can lay their hands on (whether they need it or not) shopping is a nightmare that I am seeking to avoid as far as possible.