I was anti-VAR originally because of some of the reasons mentioned on here. Far too many decisions in football games are subjective and in the opinion of the referee, whereas in most other sports they are a lot more black and white. I've come round to the fact that it is here to stay, but I do think it will always be controversial as there are some match situations where you can show the same clip to 10 referees and 5 will say foul and the other 5 no foul, the potential foul on Gabriel in the Newcastle vs Arsenal game being a classic example. I just can't think of other sports using video reviews where that happens.
Certainly in cricket there is much less ambiguity. Their use of technology is perfectly suited to the sport.
With rugby there is more grey area especially with the new tackling rules, but with both sports it is obvious to everyone what is going on, unlike VAR which is always veiled in secrecy.