Also is a penalty a penalty? Some will be obvious, but many aren't and some contact looks worse in slo-mo than at full pace. Perhaps penalties should only be judged at normal speed.The only issue with human interpretation and VAR is handball. And given that the handball law is changing, that should end the problem.
I saw one incident recently that looked one thing at normal speed and another when viewed slowly....a coming together of two players looked like an accident at normal speed, but, when viewed in slo-mo, it looked deliberate because one player appeared to look at the other player before the collision. A flick of the eyes (an entirely natural action when you suddenly realise you are about to collide) looked like an appraisal before a deliberate shoulder barge. Eye movement can be a reflex that is faster than conscious thought.
Slo-mo should be used sparingly...as should VAR imo.

