If the Sydney clubs were prepared to work with the NRL to negotiate stadium deals, those economics change dramatically. From a Venues NSW perspective, unless it's a marquee game like ANZAC Day or Good Friday, there is minimal value in them offering cheaper rates for Allianz or Accor for only a couple of games from clubs like the Sharks, Sea Eagles, Dragons, etc.
That changes dramatically when, instead of negotiating say 1-2 games, they are suddenly negotiating 20, 30, 40 or more games.
This is one thing the AFL does well, and it's something the NRL tried, but the clubs pushed back on, is going into these negotiations in partnership. If the clubs & NRL are negotiating together, you can use the marquee games and events like Origin, to help push down lower tenant rates and often negotiate other benefits.
In the AFL - MCG deal, in exchange for 45 clubs games per year, the GF and 10 Finals games over 5 years, each club games $100K to play home games at the venue and a share of 68.9% of all revenue derived from AFL games.
NRL possibly can't get a deal like that, but between hem & the clubs could work out something between all the VenueNSW venues (Commbank, McDonald Jones, WIN Stadium, Accor & Allianz) that's more beneficial than what the clubs are negotiating currently.