I understand that, and had it been flagged play would have stopped or they would have scored with the flag being unnoticed but the majority of the fans + TV commentators would have seen the flag and therefore realised the goal wasn't going to stand. Instead of having a minute of jubilation, to be followed by total dismay. The whole situation would be avoided. Miles better than what actually unfolded.
They even out over a season and there aren't as many bad decisions as what people make out.
People are definitely more outraged because of the game situation. The fact a really special FA cup moment was ruined. For all intents and purposes those players were level. Nobody could give that as off-side with the naked eye. If that was shown without lines, people would have accepted that goal.
You might struggle to believe that other people don't agree with your obsession of getting borderline offsides 100% correct at the expense of being able to truly celebrate goals as the ball hits the net, but that is the reality. The majority don't want it.
I'm trying to work out where the outright rejection of something that hasn't really been a major issue since the first season of VAR has come from. I'm still 100% convinced it is because of the teams involved. I even celebrated it a bit myself and was also disappointed that it was disallowed but I accept that it was disallowed correctly and it would make a mockery of the system if we let it stand because we're only allowed to make decisions the linesman would have made anyway.
If the offside was an automated decision and it raised the flag in real-time, as it does when a linesman puts it up, would you accept the decision?
If yes, then the decision itself isn't the problem but the speed. What's the max delay that would be "reasonable"?
Is the decision incorrect, i.e. do you disagree that it was offside?
If you do then maybe that's where you have to accept that the technology is better at it than you are.
What distance offside does a player have to be before you deem it an obvious error?
Whatever distance you choose remember that the unacceptably small margin we already have will not be acceptable for you when determining offside at the new point either.
If you categorically know a player is offside but you allow it because you have a sizeable built-in margin for error then why would anyone be happy about that when you have the information available to make the correct decision?
Is correctly disallowing goals so fans celebrate when they shouldn't really worse than preventing goals from happening in the first place when linesmen incorrectly flag for an offside that was clearly on?
The VAR rules means more goals are scored. It means more are disallowed as well but none are incorrectly prevented from happening due to incorrect offside calls.