Why is it virtually impossible to find a great instructor and martial arts dojo in

[MartialArtsatHeart]

Sydney? I live in Sydney Australia and all we have are taekwondo mega mcdojos but I was looking for a bjj jujitsu Japanese judo or aikido school in Sydney that is a very good school legit traditional and what a dojo is supposed to be like. What I want is a very good school with good instructors and what an instructor and dojo is traditionally supposed to be. Does anyone know any good schools in Sydney please?! Thanks