Correct. They're also well paid professionals who should be able to perform accordingly.
The referee for Man United - got the decision wrong, got told this by VAR and advised to watch again, then doubled down on his wrong decision, resulting in Howard Webb having to put his tail between his legs and apologise to Forest.
Last night - the referee was 10 yards away with a completely unobstructed view. If he can't see that in real time from there, then he shouldn't be officiating. Also strange that he didn't consider that to be violent conduct but think it was when Ballard accidentally grabbed a couple of dreadlocks. Taking into a account that this is the ref who allowed himself to be humiliated by just standing there like a tit while the Chelsea players huddled around him, it's hardly a surprise to see him continuing to be weak towards the biggest clubs.