Well that simply isn't true because no human is impartial and the instances such as fouls are up to the interpretation of the referee, not only that but the general interpretation of rules continues to change and will forever continue to change. And other sports have issues with technological rulings and their interpretations, it is just that those fans don't go into complete meltdown over the rulings every week like English football fans do. I watch American Football every week and there is always a debate on 'does he have control of the ball' for receptions/incomplete passes, but people get on with it on don't stew on it for months. In hockey there are instances of a player moving from the neutral zone over the blue line when the transition play happens, two minutes later a goal is scored of no consequence to the offside but the coach can challenge that ruling, often to debate; does the ruling stand or does the coach essentially delete two minutes of play, without returning the time to the game clock? Also in NHL, depending on what time of the season it is different penalties are called more thoroughly, cross-checking will never be called as a penalty in the play-offs but early in the season it will nearly always be a two minute minor.
That isn't even scratching the difference in rules in other Football Associations.