Unique/untradeable is only for gameplay purposes really! Take Grand Company gear...you see NPCs wear the stuff all the time, even if it's unique for you (it's literally just so you can't have more than one copy).
Also, speak to Rowena, she has lore about what all that endgame stuff is! Ilvl90 are replicas, ilvl100/110 is stuff made by Gerolt once upon a time, and ilvl120/130 is made by Garlond Ironworks. The job quest stuff, well, they're certainly not unique but they are rare. Lots of people come up with different RP reasons as to why they have a set.
Also, speak to Rowena, she has lore about what all that endgame stuff is! Ilvl90 are replicas, ilvl100/110 is stuff made by Gerolt once upon a time, and ilvl120/130 is made by Garlond Ironworks. The job quest stuff, well, they're certainly not unique but they are rare. Lots of people come up with different RP reasons as to why they have a set.
