Cause derbies & history are interesting, rather then watching plastic clubs with no real fans & devoid of local players..
If that is your basis then you’ll never grow anything because history has to start from somewhere.
Based on your train of thought, the game would never have left Sydney and all the talented athletes you see play the game would have pursued other sports where they could earn more money. You can argue as much as you want but it is simple and demand economics
Then lastly and this is the English word I hate more than any other: real. It is often used in such a flippantly or incoherent fashion.
Define what a ‘real’ fan look like? Are they sitting on their backside watching a game on TV, are they going to games, are they buying merchandise? Or is it a location thing? Is it a socio-economic thing? Or is if something that you can only judge? It is such an perverse thing to make a judgement of authenticity on such a thing