I’m not sure I understand the analogy between food shopping and sitting in a theater for 2 1/2 hours. I think given the choice between attending live shows and watching television, many people will decide to stay at home simply because they don’t have to wear a mask.
Even in the days before COVID, it was hard to fill theaters. A lot of people will decide they don’t want to sit in a theater with a mask on, probably enough to make it impossible to run a show profitably.