Montesquieu wrote:
However, there was no need in the ref's judgment for the O'Hara play to be reviewed. She was in excellent position, about ten yards away (if memory serves), and she saw the ball hit O'Hara's hand. She has the final judgment. VAR cannot overrule her, it can only assist her. She clearly did not think she needed any assistance; the situation was a common one, one that she had unquestionably seen many times. In 2014 she was ranked as the second best woman ref in the world; in 2015 she was ranked the best ref in the world; she refereed four games in the 2015 World Cup, including the final.
Exactly right.
Rojo, this comes down to experience with the game. I know I've had reactions similar to yours when watching sports with which I'm less familiar, like American football. A bunch of my friends will jump up and immediately recognize something should be called, and it takes three replays for me to see what they're talking about. When you know a game as well as an elite ref, everything you've seen is a variation on what you've seen before, and the brain can instantly categorize it into one of those boxes.
It's the same for players. Sometimes you an intricate set of passes looks astonishing to someone who doesn't play, but that's because those players aren't holding the position of each player in their head and calculating exactly where they can go; they're thinking in terms of broad patterns. When a number of players respond quickly to the patterns they see, it can look like it's choreographed, but it's not. Chess is another example. Expert (or even average) players can play games in their head and remember perfectly the position of every piece, but if you scatter the pieces randomly on the board, they're no better than a non player at remembering their positions because it's just a ton of data, rather than a handful of larger patterns that they've seen a million times.
The two calls are very different from a VAR perspective. The PSG handball required VAR because it was very fast, and the ref didn't get a good look. Watched live, even from the field, it probably looked like the ball went off the defender's back. But because of the defender's movement, there's no question it's a handball IF it touched his arm. VAR was necessary so the ref could be sure of what actually happened. With O'Hara, the ref knew what happened, and the question was how to interpret it. An inexperienced ref might have used VAR to stall so she could have decided how to interpret it, but that's not what VAR is for. This ref was experienced enough to decide instantly, reflexively that what happened was fine.