Blue
Ravenous Bugblatter Beast of Traal
There's nothing meta- about wanting to be the very best, like no one ever was. That is entirely an in-character motivation, for certain characters. And there's nothing stopping an NPC from sharing that motivation, either.
At best, we might infer that training is less efficient of a teacher than on-the-job experience, or else we'd expect improvement-motivated individuals to spend time training instead of going on adventures. That's still an unproven assumption, though, since the rules don't concern themselves with non-adventurers.
Let me know when you want to get back to addressing the point we're talking about, which has to do with mechanical rewards for specific types of play. Something that you were very against in FATE, but seem not to be able to address in D&D.
FATE: Act like you said your character acts and we're reward you mechanically.
D&D: Kill monsters and we'll reward you mechanically.
Again, the prevelance of the murderhobo concept shows that rewards really do change how many play their characters.