Semantically it doesn't have anything to do with your character level, you are still gated by your level from actually getting the spells. Which is - GASP! - no different from acquiring skills through exp grinding, let's not forget that a majority of skills aren't even unlocked in ff xiv through leveling, and are instead unlocked through JOB QUESTS. You know, solo instances with their own solo content and fights with objectives and such that are unique to them?
Ala rogue's stealth mission that couldn't possibly have fit into XIV and obviously required it's own separate content because, well, you've never snuck around as a thief before in order to learn your skills!
