I see the argument about "why do male viera when the female are incomplete?" a lot, it's not entirely wrong, but as a developer I can tell you that it's easier to revisit all the hats when you are already revisiting all the armors in game, it's a chance to add "adjust 50 hats for f and m viera" to a schedule that is already forcing the worker to do something similar, same happens with hairstyles, in this line of work a correct workflow can reduce the workload a lot.