Square gives zero incentives for the XIV player-base to improve. It's that simple.
Nothing in the barebones casual content teaches players any fundamental basics or meaningful concepts, all the way back from Lv1 to Guildhests/Dungeons/Novicehall to the end of Endwalker, it's filled with effortless hurdles and no real increasing difficulty. This instills carelessness as there is no need to improve or learn anything.
That is, until it does... which usually is at the players first real hard wall i.e " Their 1st Extreme ", often through Partyfinder. If the player has no history of raiding in any other game... Then suddenly? all the concepts they didn't knew they needed or wanted to know about gets thrown at them and it goes from relatively " Nothing " mattering to relatively " Everything " mattering.
Coupled with Partyfinder being filled with players who want to reach a certain Goal in a timed fashion, creates an environment that demands players who join Partyfinder? to know at least the fundamentals of raiding or mechanics and Job basics that Square never really directly taught players. So I believe players aren't inherently bad? its just Square having done a terrible Job teaching players anything ever in XIV, mhm.