I'm not sure why they're listed on FFXIclopedia as part of the AF sets. The only reason I can come up with is that they're named the same way as AF armor. (Wizard's Torque corresponds to Wizard's Petasos for BLM, Fighter's Torque to Fighter's Mask for WAR)

But yeah, the only real reason that people even get these items is so that they can unlock the job emotes that you get for completing the trial.