they get plenty of them wrong, particularly the strip/loose carry. Every game we see loose carries ruled as strips. Doesnt seem to go the other way, which again leads to this preconceived idea stuff. I guess they dont do home work on forwards who carry the ball loosely... Call what they see, at least then when they get it wrong it's an honest mistake based on what they saw, not a mistake made on preconceived ideas and zero evidence.
But yes, if they consistently get the calls wrong, people will complain and it will up to the NRL to remove those who are not up to the task of getting themselves into correct position to see what is happening. There is 2 touch judges, and 2 on field referee's including a ruck ref. It's not that hard.
The added bonus is if you stop rewarding loose carries with penalties because your home work tells you some "serial offender" is around the tackle, maybe it will put the onus back on the players to secure possession properly, so the cheeky quick slap at the ball wont dislodge it and you'll have an easier time differentiating between strips and loose balls