Yes. When I was in Hamburg the supermarket around the corner closed at 21:00. What was the result? I became lazy and went shopping for groceries later than I would have done ever in Austria (here supermarkets usually close at 19:00, at least in my town).
Just because there is someone, who will do the job, doesn’t mean we need to create that job. Business hours on Saturdays would be a compromise, I guess.