Have you got to Floor 200 solo? I assume you have if you don't think there's any difficulty. There's a huge amount of things that players can do to learn their class but unfortunately the meta in this game is "reach cap ASAP" & people will always use the easiest route, regardless of whether it helps teach the class or not.

Ideally things like Hall of the Novice (& the upcoming version) should be compulsory. Job quests should force the use of abilities (a bit like Hall of the Novice). Guildhests should be signposted as important too, currently you might miss them altogether if you're not told about them.