I think someone made a fair point on the BBC live text last night. If officials are afraid of making mistakes then they could be sending loads of tight offsides to the VAR. We could end up with 10 in a match (or something).
How many tight offsides are there in a standard match for them to even consider sending upstairs? Especially ones that result in goals? Maybe 1-2 at the very most? And most matches will have none.