This is exactly what I mean about people not being in the real world sometimes.
Yes, people are stood about chatting in supermarkets. People bump into people they know and won't have seen for ages so they stand around and have a chat. Add into that that a lot of the time it's old people who have no spacial awareness and the mask below their nose when trying to do their shopping as well.
Look at Coombe Abbey the other day (yes I know that's outdoors), they were so full they had to close the carparks it was that busy.
For 15 minutes? Without masks? In crowds so big they block the aisles? And the staff or other customers don’t say anything? Not sure if your experience is that typical, I’m out in the real world plenty and I’ve never seen that.
Not sure what you mean with Coombe Abbey. Spending the day wandering around outside would be fine so long as you kept your distance and wore a mask. Much safer than large numbers of people inside a poorly ventilated restaurant, church hall or gym.