Or, as the VAR protocol puts it, the question is not, "was the decision correct?" but: “was the decision clearly wrong?”
I also think that although it's a small distinction, it's significant that whereas the original VAR protocol only used the phrase "clear error," the section in the LotG regarding VAR uses "clear and obvious error," as if to reinforce the idea of just how clearly wrong it has to be, before the referee's original decision can be changed.