The workers can’t restock the shelves while the aisles are full; I’m not surprised by this. You’re right - it puts more people in there in a shorter window - but they have to be able to maintain the store/stock the shelves. Also, their cashiers are exhausted - and exposed to far more potential carriers than most of us.
Maybe divide the store in quarters and service one section at a time? For the emergency service personnel, who are given off at staggered times, this isn't good. But given the mindset of today's CEOs, all too typical. We're a long way from the days of Sam Walton.