Hingan Armor Display

So I just noticed after getting all the mats to give to my bf to craft this, that I have to craft it myself actually, since Urushi is untradable and MB prohibited. My armorer is 60 right now, so I need to level it to 66.
Is this a huge oversight or intended? If intended, why????

He can easily buy the Urushi himself. It's bought from GC for 600 seals each, 50 Allied Seals, and sometimes lv45 CRP leves award it.
It's weird they'd use the untradeable one though.