Indeed when using 25 frames per second 2 players moving at a mere 3 metres per second in opposite directions results in a 6 metre differentiation per second or 24cm per frame, and they reckon they can without doubt call a decision to a cm is total on utter fabricated bollocks. Even if the defender is static its 12cm margin of error per frame, and 3 metres per second isn't even sprinting, that's doing 100m in 30= seconds, imagine sane for example running full tilt at 8+mps with a quick full back running forward to try to play offside at 7mps that iss 60cm differentiation per frame, but we still trust someone to draw a line and say definitively he was 3cms offside totally disregarding the margins of error the laws of physics have dictated since time began.
I have gone 100% full circle on VAR from total support of the concept to absolutely hating the way its been corrupted and fully expect it to be used purely as a tool to appease the broadcasters rather than fans or actually improve match integrity.