
Originally Posted by
Wyssahtyn
The WoL is somewhat unusual in that they're relatively quick to draw out a given soul crystal's memories and such. Such things typically require diligent study and training for the average person as "without first attaining sufficient proficiency and tempering one’s soul to mirror the maturity of the crystal’s contributors, a prospective student will be denied even the slightest glimpse of enlightenment" .
Anyway, in terms of classes, that is, GLD, THM, ARC and so on, the average person should ostensibly be able to pick them up given enough time and dedication. Whether they would considering other factors in their lives is another matter. Note that adventurers aren't necessarily representative of the population at large either.
Jobs, I would say, are another matter really, since they're either scarce, have certain cultural ties/requirements, and other such factors in their availability. Then there's the obvious time commitment as well. Like, MNKs were part of the Fists of Rhalgr, so the average MNK would have spent an X amount of time training as a novice, after which they were given a soul crystal. Then they would have to spend X amount of time training further to attune to the crystal's memories and open their chakras. It wouldn't, or at least realistically shouldn't, leave much time to, say, go learn how to be a RDM, which itself requires a foundation in thaumaturgy and conjury, even with a soul crystal, which we know since a certain NPC is stuck having to start over from the beginning as it were after certain events.
Basically, in a vacuum with infinite time, the average person probably could learn all the classes and jobs to the same degree as the WoL. However such circumstances are obviously impossible. Most folks will probably specialize in one or two other things at most that are probably related to whatever their primary interest/profession is. A culinarian, say, might go and pick up some knowledge of alchemy so they can source some of their own ingredients like oils and natron and perhaps botany too to get herbs and spices.