It makes sense that people would be drawn to the fish-out-of-water archetype. It is the archetypal protagonist for the "hero's journey" monomyth. The whole idea of the character who is just learning about the world works great for that sort of hero-centric story. But RPGs aren't meant to center around one character, they center on a party. And the stories tend to work better when the characters feel like they are part of the world.