Not showing replays on screens in the ground shows contempt for match going supporters who are less informed than anyone watching on tv.
Referees and officials cannot always see or make the correct decisions. VAR was meant to assist In critical or contentious situations or where there has been a clear mistake. In Rugby refs are miked and call out their decision and call for on screen evidence to prove or disprove it.
In football it is all smoke and mirrors. Clear and obvious errors are still made. Inconsistensies in applying the laws of the game continue. Worse is that changes to the laws and interpretations are being made on the hoof.
Liverpool and United have probably been the main beneficiaries of VAR. They are two of the richest clubs with two of the biggest capacity grounds in the Premier League. The question should be why these two football clubs are the exception by not having big screens in their grounds that can show replays when PGMOL and their referees only make token use of pitchside monitors?