I'm confused...it seems that MA f all hobbies is the one that you do not want to put on airs about skill that you don't have. Good way to get hurt
Very true, but folks do it all the time. Perhaps they figure it's intimidating.
I look at my avatar picture. The gentleman next to me (I'm the taller one) in GM Park, Hae Man. He is a legend in TKD circles as one of the men responsible for the Tae Guek poomsae. Both times I've met him his uniform was very simple & his belt plain & very black. He of all people in TKD could wear a very worn belt & folks would appreciate it: and yet he doesn't.
Like most our fields of physical expertise, wearing what "the pros" wear doesn't make you a pro.