This is what the ref's boas says about it:
Annesley pointed to the fact the NRL had tried let video referees rule on forward passes in the past, as evidence that it doesn’t work.
“We did actually have a season of the video referee ruling on forward passes and it was an unmitigated disaster,” Annesley said.
“Clubs were up in arms and at the end of the season everyone was happy to get rid of it.
“It also reintroduces more video decisions so we have more stoppages, but what I have tried to demonstrate is the difficulty in making these calls based on video.”
https://www.foxsports.com.au/nrl/nr...y/news-story/895cda0ff8f6b5622fc18cebf37ed30b
Now we all know that you can pass the ball backwards and it will still travel forwards (physics) but I think what we're all saying is that when there is conclusive proof, the vidiot should be able to rule on the pass...just like they need conclusive proof to overturn ref's try decisions.