I also don't believe that VAR and the bunker are substantially comparable in their necessity.
The bunker is far more necessary due to all of the various and very fine margins of rugby that the naked eye cannot determine in real time amidst the game's speed and body commotion. If it weren't for the bunker then a very large proportion of awarded/unawarded tries would involve some guesswork from the referees, especially in the modern game. With football on the other hand, competent onfield refereeing would not very often rely upon guesswork to award or dismiss goals, because goals are generally far simpler to observe than tries. There are basically only a few variables to consider when awarding goals, and those variables (such as an offside, handball, foul tackle) tend not to occur all at once for any goal scoring situation. In real time, competent top tier referees should be able to determine offsides, handballs, and illegal challenges.
