Just to make a point here, Judo/BJJ stand out because their "dress codes" are actually part of how the sport works in practice. A lot of throws and holds involv

Just to make a point here, Judo/BJJ stand out because their "dress codes" are actually part of how the sport works in practice. A lot of throws and holds involve the gi, so standardizing what's worn (which has been done in the case of Judo for a very long time) isn't just aesthetic or traditional. I don't believe that in the case of, for example golf, the dress code is functional.