The rebuttal is: works fine on airplanes (minus abusive change fees for economy seats)
Most flights are available at high frequencies (on the order of days, weeks) compared to concerts (once a year or so). You also don't care as much about sitting together on a plane.
Most flights are available at high frequencies (on the order of days, weeks) compared to concerts (once a year or so). You also don't care as much about sitting together on a plane.