I know what you are saying but var gives you the chance to see if they were interfering or not. Without var, that decision is very difficult to make.The argument has now changed though.
Previously it was if the player was onside or offside (factual)
Now it’s if they were interfering (opinion).
The argument is slightly different, personally I prefer it without the VAR
Incidentally, the arsenal second goal comes very much into that territory. I'm surprised more wasn't made of that