So one person has a different opinion it happens all the time. A different opinion is not a clear and obvious error.One referee deems it violent conduct/excessive force, another doesn’t.
The second referee then suggested the first has another look at the decision again.
The first referee then has the choice to stick or change his decision having reviewed it on the screen.
If Bernie thumped Pope but the ref sent off Foden I could see the var ref getting involved. Not one opinion of two feet off the ground and out of control.
That's VAR running the game not the referee.
I am not against var per se, they had a perfectly good goal chalked off, VAR corrected it. That was fact not an opinion.