It was the same as « any contact on an opponent’s throat is a red » when they sent off Casemiro, « any dissent is a yellow » when Dalot got 2 yellows in the same action for acting frustrated, same as « any bad words are red cards » when Maguire got a red even though no one really heard him.
Then you’ll have people saying « yeah but these are the rules, said player is stupid to give the ref a decision to make », even though the exact same things have rarely been sanctioned before or since our players got a red.
At least refs are consistent in that they always judge us to the letter of law every time