https://www.cdc.gov/coronavirus/2019-ncov/faq.html#Spread
What, without evidence of it ever spreading from one person to another in a grocery store, you believe it isn't possible? Is extrapolating the knowledge of how it spreads to the possibility of encountering that situation in a grocery store not viable here? Shall we wait for evidence of spread in every single possible permutation of leaving the house before we consider such an activity potentially dangerous?
I was challenging isolation. I go grocery shopping - I think it can be done safely. But, I wouldn't do it if I lived in some red state full of pandemic deniers with huge spread rates - it's too dangerous. In my area, everyone wears masks, everyone makes sure to social distance, so it's not as much of a risk. But I acknowledge that I'm not isolated, and that was the claim that was made.
We have extensive contract tracing now in every state in the US, and around the world. I would think it wouldn't be that hard to show. Were you able to find any cases?
You failed to answer my previous question: is it impossible to extrapolate knowledge of how the virus spreads, to judge risk of various scenarios?
Do you require evidence from every permutation of possible activity?
If you go to the grocery store or receive deliveries, you're not isolated, and government policy that reduces viral spread benefits you.