I wonder who told him the jedi wear robes? I bet it was Obi-wan.
Because he is Obi-wan *dramatic shrugging off of robes* Kenobi.
So here’s how it went.
Luke: *looking for clothes after rotj* hmm, I wonder what the jedi wore?
Luke: *picks up outfit* eh, I guess this’ll have to do.
Force ghost Obi-wan: *appears* robes.
Force ghost Obi-wan: roooobessss!
Luke: okaaaay *continues to go pay*
Force ghost Obi-wan: *moans* robes.
Luke: you’re going to have to use more words, Ben, if you want me to understand you.
Force ghost Anakin: uh, let me explain. The jedi used to where robes, and Obi-wan here loved them. Whenever he would go into a fight he would dramatically shrug off his robe. They were the only good thing that happened to him in his, sad, lonely, depressed life.
Force ghost Obi-wan: *nods head* robes.
Luke: oh, well, if they were part of the jedi’s attire, I might as well where one. *picks up robe, then goes to pay*