Parser aren't needed for that root problem the game teaching people how to play is. Its a problem in all mmos and every community falls into this trap of blaming the players and not the game. When I play street fighter I don't have to go and google Ryu's moveset I press pause and its right there they even have a mode where i can go practice in a live combat situation. That applies to every single other game genre out there why not this one?
As for your other point in ARR is plain wrong the reason it was "harder" was because everyone was closer to the minimum ilvl to get into the dungeon so you weren't over powered for them like you have been in every single endgame hw dungeon past the first two
as for extreme primals all of the hw ones demand much more of players since pretty much all of them have mechanics where if one person dies they kill another single person at best and wipe the group instantly at worst not to mention higher dps checks more complex rotations and mechanics