Again, you're confusing the relic quest with the AF quests. This isn't about relics. This is about AF armour. If I recall correctly, a dragoon, or a bard, or a paladin can do all of his or her AF quests as a dragoon, bard, or paladin. This is no different. Us gatherers want to actually gather to earn our AF.
When Yoshi gives us relic fishing rods, pickaxes, and hatchets, then the issue of needing other classes can be raised. Until then, this is about AF gear, which is, even in this game, a nice self-contained little questline. That one can do entirely as their chosen (required) class/job.
EDIT: In addition, the fact that the DoWs and DoMs get full quests and lore and backstory and what have you for their AFs while we gatherers get... a 1% drop? That's insulting. I realise the AF armour for DoM/W is tied to the job system and it was also a way to introduce the jobs, but we need some loving too. Let the Fishermen's Bottom award the new AF to dedicated fishers. Let the Miner's Guild give the new hat to miners who don't spend all day oggling the strip- the dancing girls.
