While I agree it is also over stated we hear this all the time in the AFL. I get rugby is a different market with less in the salary cap and players unlikely to commit to one city for as long.
We always hear Sydney needs COLA (cost of living allowance 10% extra in the salary cap) back. Yet players start out on over 100k a year plus match payments often living with a senior player in their spare room or in a share house rental that the club manages.
Especially with the average AFL salary being at 441k with a 20% pay increase over the next few years they can afford to live in Sydney.
Also as most players do they buy a house then sell when their career is done and come home. If we look at this data published in domain
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Players playing in Sydney buying a house and then returning home are actually better off in the long run