I think the main complaints about VAR in football have been the amount of time these decisions take and the inconsistency of the rulings. Instead of the constant play we used to have, now we see players stand around as the screen shows lines drawn in seemingly arbitrary locations to decide whether or not an attacking player was onside before a goal.

In contrast, fans have been fine with the goal-line technology, which gives decisive (usually) and quick results.

The use of AI in this paper seems more relevant for setting team strategies and picking players rather than enforcing rulings.