In that case every GM should be thoroughly versed in all pve aspects of the game, which of course is impossible to achieve. It's not Blizzard employees here, it's game fans like you.
In this case, it is strange that a GM would get involved in gameplay without proper competence.
example: in the rules of pvp (arena and bg) wintrade (incomplete resistance) is forbidden. I feel like 50% of the players on the bg are doing this. But in fact there are just nubs who don't understand the principles of the game. So it will be incomprehensible to them, and it will seem unjustifiable to punish them for their level of play.
Looks the same, mb u were kicked for a reason that RL can understand, but GM not. Mb not. There are no ways to check. I wanna see the result also)