That's just not true. There has been a line waiting for an outside table at Bard and Banker, Irish Times, and The Local every sunny day the last couple of weeks. Whistle Buoy has been full, The Drake has expanded to the lower level of Market Square. They may be empty inside, and they may be struggling to make enough money or hire enough help, but there is clearly demand for additional outside seating in the downtown core.
Are you talking during the day or in the evening? I go by there during the day most days and I rarely ever see anyone at a table.