Face it. The English disease of having to be different to the rest of the world is behind this. The FIFA Laws state that the final decision is with the ref on the field. The FA have issued instructions, against the wishes of FIFA, to refs that they accept the word of the VAR referee and not "waste time" checking for himself on the pitchside screen.
If the VAR thinks the ref got it wrong, the ref is supposed to see for himself. The FA has decided they know better.