Orikoru
Tour Winner
I don't agree with you, because by your logic it's impossible to actually be level if you analyse it forensically down to a fraction of a millimetre. It should not be that clinical.You’re missing it! If one toe is ahead of the other, regardless of when they freeze the frame they ARE NOT level.
What you are asking for is a margin of error and anything within that margin is deemed onside.
But remember, if that margin of error is for example 2cm then 2.01cm would be offside.
This happened a year ago:

Ok it's not the best angle, but I remember from all the angles he looked absolutely level with that defender. Even while doing this review I felt sure they were going to give the goal, but it was given offside. He is not offside there. I don't care if his shoulder is a fraction in front of the defender's knee, that is absolute nonsense. Pukki there has kept himself level with the defender, which is all he can be expected to do. He's level! Forensic analysis is not required, he is level to the naked eye and that's all the detail you need.
Call it margin for error if you want, but if a forward has done all he can reasonably be expected to do to stay onside by staying level with the defender, we should not punish him by analysing in forensic detail to show one of his leg hairs was actually offside. It's ridiculous, and I'm not sure even you would want that, I suspect you're just arguing the Devil's advocate because that's what you always do. Why would anyone want this? That picture above is not offside, I don't care what you say. Strikers are going to need Matrix binary vision to stay onside if it is. Football is played by humans, not robots.