A number of the crafting class leaders are involved in events outside the base quests. Some are even involved in seasonal events.
For example, Beatin is involved in a couple holiday quests as well as the harvest dance emote unlock quest.
I think they want to save them for later progression past 50, and referencing them would involve making 9 moogle mail quests at once.
Though...you never know...this would be the perfect thing for 2.55.