So tell me... Why does the home team win the count?
This is not exclusive to NRL. It happens in pretty much every sport in the world. Home teams get advantages from refs, and players / teams considered great get advantages. Combine the two...
I remember a study undertaken in European football and it came out that the home team got a certain amount of free kicks more than the away team on average.
It's simply human nature to get caught up in the momentum and atmosphere, and to believe that the home team is on top and deserved of the calls.
I also recall plenty of players complaining that Michael Jordan used to "push off" with his forearm. And he often did. But the refs knew how great he was and so when he did something good they assumed that he had done it within the rules.
Look at cricket as well. The Aussie cricket team used to get plenty of dodgy calls. No longer. India get all sorts of dodgy calls go their way when they play at home, even since the introduction of neutral umpires, because of the fever pitch atmosphere they create. Sitting at home, you can sense that the umpire is about to make a bad call because of the momentum and atmosphere. But it would be nearly impossible for the men in the middle to recognise they were being influenced, and even harder to stay objective even if they did recognise it.
Parra simply have to deal with the fact that we are a terrible team, and until we start to turn that around we are going to be on the wrong end of the penalty count. And it will be worse when we are away from home.