I imagine there's also the untold pressure and ego of not wanting to be the first VAR to be overruled.
Everytime the ref is sent to the monitor, it's an automatic change to the initial decision.
I can't think of a single event where the opposite has occurred.
Also, all this refs and decisions talk over the past few days has got wondering if there is or should be an independent party that does a check the checker type audit on refs decision making. One that looks at events beyond a singular match, identifying gaps in knowledge, behaviour pattern, baises etc. I'll be curious to know if a ref has a tendency to make certain decisions, e.g. in the 50/50 type situation outside a small sample size. I suspect there's plenty of insight to be gained there.