All the things people mention above. The question is "useless for what?". I really enjoy crafting. I probably do more of it than anything else in the game. It is an aspect of the game in its own right with its own progression challenges and stands on its own feet, as well as being very supportive of other aspects of the game. Perhaps people who like only crafting (and I know a couple) think that dungeons are "useless" or hunts are "useless" except for the loot they drop for crafters. Just thinking aloud.