Technology aides officials in other sports perfectly well, with prime examples being tennis, cricket and rugby to name a few. It even works fairly well abroad.
The elephant in the room is how it's implemented by the PGMOL and how they, as a closed shop, continue to facilitate their terrible decisions with impunity.
Look beyond Everton and you see it all the time; it's on the TV every week (albeit less than the start), fills radio commentary and is a prominent talking point.
Our own examples are ludicrous: off the top of my head you've got the Spurs handball; Gordon's penalty; City handball; the lack of a foul this week.
If there's a potential issue, show it live on the screen and/or make the commentary between the official public. Why don't they do it? We know the reason why.