I have a theory people who owned a original NES and played like Mario, Mega Man, Ninja Gaiden, the first Ninja Turtles or any of other classic NES games are much better at FFXIV then people who have never played a NES. Why because old school NES games required a lot of memorization and quick reaction to stuff to beat the game.
They wanted to put in more things in FFXIV that require quick reflexes and pattern memorization to make the game harder. If you only played turn based rpgs and never played a platformer or action game then you won't do as well. Even playing a competitive FPS that requires twitch actions to win those people will do better as well.