Well, that's why perspective is important. Also important is not to confuse abstract influence and themes with concrete parallels. We can easily end up focusing too closely on one piece and end up missing the rest of the puzzle. I agree The Fade itself has many themes related to psychology (mainly jungian) while Evolutionary psychology could be applied to the Elvhen people. Comparative Mythology seems ripe in any culture we've encountered. The Monomyth is extremely broad and can be applied in most interesting stories 
All of these themes however have very limited value because of the "clash". Reality vs. Fantasy. Magic is what changes everything, the "invariable" constant, which is why we can't reason in scientific terms or assume anything concrete based on similarities alone. That's also what I think makes it so interesting. Anyways, I'm glad you also like discussing lore.
Ooooh. @w@ I see I popped in at a good time.
I don't believe this "clash" you describe exists, to be honest. One of the more interesting conceits of DA is the suggestion that the 'fanciful' nature of magic is (at least in part) a matter of perspective and degree. In game, mages draw upon the fade- potential in raw form- and give it shape on this side of the veil by enforcing their will upon it. To put that another way, magic is the means by which a mage changes the world around her.
Now consider your own free will, your ability to choose. Is the process really so different, conceptually, from magic? Faced with raw potential, we direct our will toward the outcome we desire. We choose- and by those choices, shape the world around us. It's not as easy as magic, naturally- but it's not supposed to be. To quote Cole, "this side of the veil is slow and heavy, but here is what can change." Shaping Thedas is easy. Change on this side of the veil is hard. Wishing our reality were other than it is has no effect at all. Our magic lies entirely in the choices we make, and the actions we take to see them realized.
Consider another example: veilfire runes, and their ability to evoke meaning directly in the mind of the viewer. Again, what distinguishes them as 'magic' could be considered a matter of perspective and scope.
Tiny pink poodle wearing a zebra pimp hat.
…not a great example, but there you go. By arranging lines and dots in a very specific pattern, I placed an image directly in your mind. It's not Tevinter-style mind control, of course. You recognize the thought as having an external source and are free to dismiss it at will. Still, as you read, the thoughts of another person - possibly far removed from you in space or time- temporarily take residence in your mind.
To get back to the point, I don't consider magic to be a transformative element in the DA universe. I think it's a pointed thematic marker, a fun-house mirror exaggeration of an aspect of our own reality. Consequently, I don't believe its existence invalidates the connection between the "real world" and the game-as-fade. Thedas remains a warped mirror of our own, a phantom, malleable realm in which the rules of our reality are bent, but never broken.
WHEEEE four more days!!! (((@w@)))