The charitable explanation is that he wants to be St Louis and not Philadelphia.
"On September 28, the city of Philadelphia hosted its "Liberty Loan" parade in the midst of the flu outbreak of 1918-19 — sometimes referred to as the Spanish flu. Shortly thereafter, hospitals were at capacity and 2,600 people had died.
Around the same time, the city of St. Louis was closing schools, libraries, courthouses, churches, playgrounds as well as limiting the number of people on streetcars and staggering work shifts to minimize contact. "
After reading that, I thought, if I had any choice, as a leader, I'd want to be St Louis.
Also, we saw in the spring and summer that if infection gets momentum it goes up very quickly in the space of a week, but then it plateaus and the speed of decrease is very shallow, 4 or 5 weeks.
On the other hand, I do sympathise with the small businesses. If people phone up, could the businesses deliver essential items, children's birthday presents etc safely distanced outside the house, do you think? It would be great if local business could get custom rather than amazon.