i can't think of anything that could be more high risk than a grocery store.

everybody goes there - healthy or sick, symptomatic or not. you couldn't define a better transmission vector if you tried; if your goal was to spread a virus, you would set up grocery stores to distribute food.

i'm not saying they should have shut down the grocery stores, i'm pointing out that our own white papers and planning documents made it clear that you can't stop transmission, you have to adjust to it.