But the current threshold they use takes away the competition for the advantage. Measuring an attacker's shoulder as offside when their feet are level or even on, is absurd. Yes, there has to be a line somewhere, but moving the line back allows for greater freedom. It's hard, though. You could say offside is if your feet are offside, but then you could score a header, you feet be onside but your head off. Maybe literally the players centre point...
That's the problem with VAR for offsides, though. Offside has always been a good chunk of opinion over literal measurement. We're now trying to apply a very strict determination on something that has historically been shades of grey. Changes everything.