This is the flaw with the video ref call. Not saying in this case it would have helped. But rather than have a "try" or "no try" call, there should be a "I don't have an opinion" as well, there'll be times when they just don't have a clue.
Which takes us back to the bad old days of the video ref lottery for every line ball decision. Bewilderment, outrage, frustration and "no, no, no, no!"
The whole point of the new system and why it has defused most of the controversy surrounding the video ref is that it has removed them from the middle of all those flip-a-coin situations. Unless there's substantial evidence that the call is wrong, the decision made by the on field ref stands. If it's a coin toss then by definition there's not enough evidence to overturn.
In general fans seem a lot more forgiving of a borderline decision made live by the man in the middle that replays can't prove wrong, than the same borderline decision made by a video ref after endless replays where everyone has had a chance to second guess his decision before he's made it.
Leigh.