Yeah its really strange to compare gatherers and crafters to something that would have been a normal battle job.
Blue to the battle jobs is more like a new crafter class that unlike other crafter classes can only produce a small amount of things for the person itself and since its also locked at lvl 50 it cant create even something useful for the person too. No raid gear to craft, no gil to make because you can only do stuff for yourself and next to some unique glamour items that you only need to do once because you cant sell them you will have nothing great to do with it. Would kinda feel useless too imo.
So instead now you can use that iconic spell against low level trash monsters and maybe some old dungeon bosses which would melt anyway if you run it unsynch and you could use it in the carnival (if the monster even can be defeated with it). I wonder when the awe of it will decline because you will just use it like any new spell anyway. Also having it as a normal job in content would not mean that it would be boring outside of it too. So you can still watch your needle spell in solo content while those that want it in content even with some restriction can also enjoy it there. Win Win imo. (I have seen nobody ever stating that they want the extra side content for its done, just that they can use it in other content too)