In this case, the referee had already rendered a decision on the situation, so there was nothing VAR could do since the referee's decision is the ultimate. VAR doesn't intervene unless the referee gives signal or missed a situation and he is called to check it. VAR serves as the field's assistant referee, more like,"Hey, don't come in unless I need it." As long as the VAR is under the control of the ref, nothing will change until they act independently.
Perhaps if Boufal had fell too, it would have been a different argument, but I think the first impression the referee had was that the defender had the advantage of possessing the ball, while Boufal was the aggressive challenger going for the tackle/take on, that was what I saw at first too, until I saw the replay and it was evident that Boufal even withdrew his before getting anywhere near contacting the defender, and he was the victim in the end instead, so he got victimized twice, one by the defender and secondly by there ref.
If it were Neymar or Suarez, they would roll around faking serious injury with tears streaming from their eyes to get that PK or at least the ref's attention, and that is exactly what Theo did, he knew he was going to get screwed, he is an experienced player, he took advantage of Boufal and got the decision in his favor. It would have been a different scene and decision if Boufal had fallen or faked injury, as you suggested.
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@igehhh I don't suppose that's how VAR works in total, I know for sure that it doesn't matter what the referee believe he saw at first glance, If the VAR advices him to take a secondly look at the monitor, because the have split decision with themselves, or at least a consensus that is different from what the referee, the referee's say is final but still the I don't think the referee will decline the request or suggestion from the VAR team.
Everything happens through the earphones, and if the ref tells the VAR officials that he saw the situation clearly and made the correct decision, the VAR will accept it without hesitation because the field ref is superior. I believe that most of the time the ref is forced to look at the screen due to the players' pressure, and that most of the time after looking at the monitor, they stick to their initial decision not to appear stupid.
Having said that, Morocco was on the wrong end of the officiating last night, but it didn't really matter because everyone wanted the France-Argentina final to make more money. Even FIFA wanted that, which is why they rejected Morocco's proposal for a rematch, which I knew was doomed to fail anyway. Morocco has a good chance of beating Croatia, and I wouldn't be surprised if they do.