A fair point. But I believe the virus has a limited life on surfaces, which varies according to the type of surface. I think the average is about 48 hours, and rarely longer than 72. So some supermarket packaging may have live virus on it. But in restaurants, cafe's and fast food joints the chances are some of your food will have been handled just minutes before you eat it. And ingesting infected food is more likely to infect you than handling goods bought from a supermarket, especially if you are washing your hands regularly. None of us can live completely risk-free, but we can think about things and make choices. No harm in erring on the side of caution I think.