Nice thought, but it doesn't quite work like this (regarding knowledge of the laws).When it comes to knowledge of the LotG, and let's be quite frank about it, they are probably one of the simplest set of laws connected to any major sport, the finest PiGMOL can muster will know them off by heart, inside out, back to front, and the right way round. If you came up with any scenario that could happen in a football match they would know what Law has been infringed and what sanction the LotG require to be delivered. And yet we see, week in week out, game in game out, referees ignoring the very instances outlined by the LotG as infringements. Why does it happen? The only satisfactory explanation and one which I could accept is that they were 'unsighted', but then we have flag-waving jokers to help and assist, plus another whistling wanker loitering between the technical areas, and then we have football's version of Hawkeye, video assistance. Why then do we witness, City fans more than most I suspect, referees blatantly ignoring what is written within the published LotG! Mike Reilly needs to address this without coming out with mealy-mouthed platitudes.
We all saw what happened when Moss dropped the ball with only a West Ham player competing. Fernandes nipped in and put the ball in the back of the net.
Moss did everything wrong on this occasion. We have seen that Moss earns £70k per year for being a referee, plus £1500 per game. This is a very good remuneration package, yet he can't even learn the basics of his profession. Plus as you say, the laws aren't really that complicated. And the changes to the drop ball were recent changes, introduced in 2019-20. He will have been in workshops about this very recently.
So what happened to Moss after this blunder? Nothing really. He missed Match Day 6 (the West Ham game was on Wednesday though) and he refereed Brighton v Arsenal on Match Day 7.
What did Mike Riley say about one of his highly paid referees making such basic errors? Nothing that I can find.