In principle, the delivery people don't get breathed on doing the delivery part, and the fewer people in the store, the lower the risk for the people who have to be there.

This does depend heavily on how the delivery process itself gets set up, but if everyone got delivery the risk would go way down because the store gets to be its own bubble. If the store is halfway sensible they feed delivery from the back room, rather than the shelves, too.

I do like "no ethical consumption or delivery" line.