The line between work and play is not are clear cut as people think. Look at farming simulator games, be it the Harvest Moon style ones or the proper farming simulators. Look at trucking simulator games. Some programming games have problems harder than what I face at work. Many jobs can be turned into play by removing certain parts. It won't appeal to everyone, but the idea with an MMORPG would be to have many such possibilities and a player can have fun even if only a few matches with their preferences.