Because a lot of people (not everybody), feel that all the content that the developers create for XIV is intended for them. On top of that, they feel that the content has to be available for them at all times. People need to understand that hunts are a competitive open world content. Maybe I'm wrong, but I think for an MMO to be a success, they have to offer content for a wide range of gamers in order to reach out to as many people as possible.