Re VAR, there is another thought I would like to add to the discussion.
With the increasing wealth of the Premier League - and the consequent penalty of enormous costs (not only financial) to teams if results don't go their way, the rewards for a top four finish, for example are vastly greater than rewards (or penalties, such as relegation) for those who finsih lower down the table - the pressure on referees must be immense.
Add to that, is the fact that their income is an ever decreasing fraction, or percentage, of that of those (the players) over whom they sit in judgment on the football field, - and this, in a world where income is perceived to be some form of definition of success - and also remmeber that the threats that referees (and their staff) have been on the receiving end of, have intensified, in some cases.
Human error is not deemed an acceptable excuse, or explanation, for fans, or board members, or footballers, when the costs to teams of such human error can be so high, and the supports given to referees less than ideal.
It should come as small surprise that referees may be in need of the support given by an ostensibly neutral - or impartial - piece of technology, such as VAR, in order to add heft and weight (and independent support) to their onfield decisions.