A bit annoying that we cannot bypass job restrictions on glamour but the NPCs are clearly free to wear what they like.
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For future references: If you know the NPC-name you can also go to Garlandtools and check what they are wearing.
For example: https://garlandtools.org/db/#npc/1004602
I'm all for more simple clothing, there's also the more elaborate version of the Oasis Tunic with gold chains and jewelry that Rowena used to wear I'd still love to see implemented.