While that might be true in terms of games for a competition, the Sharks and Dragons and possibly Raiders from memory have all hosted Women's curtain raisers at NRL games in recent years. Cronulla in particular.
As for the actual Women's Premiership (the game you speak of was only a TG Cup U18's game of four fifteen minute quarters), that mantle will be held by South Sydney and Canterbury this Friday at ANZ, 1:55pm kickoff prior to the NRL clash. There are a few NSW Womens Premiership games scheduled for NRL curtain raisers this year which is great news.