The wall is higher than it needs to be. Most players just aren't going to do anything to improve that requires stepping outside of Eorzea and while that's certainly laziness on the player's part, the design is also to blame. There is a lack of meaningful communication when it comes to combat performance in this game that makes improvement unnecessarily roundabout. Many players opt not to improve because they don't even know where to start and are pissed off that they have to at all because they were all straight A students before they signed up for Byakko-sensei's class and got an F. They meld incorrectly because instead of percentages, we have arbitrary ratings that require a google search and calculator to make sense of. They do sub-par damage because knowing how much damage you do requires a third-party, ToS breaking app instead of a conversation with an NPC beside the training dummy. They fail basic mechanics because hall of the novice is an optional hut in the middle of nowhere instead of, you know, a hall novices have to go through.
I think if they really wanted to they could come up with pretty good ways to coax the general playerbase into getting better, but it's probably just not on the radar. Between 5.0 design, 4.x development, bugs, and drafting a statement that pretends to care about PvP, their hands might just be full.