Quoted from rai:Basically Targaryen is a small sample. Ok it's got the dragons, likely that's what Stern wanted to emphasize as both MMR and The Hobbit have a dragon. But the interesting characters specifically Tyron might not appeal to people who don't know the books or the TV show. So put a cute girl and dragons even though to me they are more or less fluff (IMO).
I think you are way off base here. Daenerys and the dragons are key to both the series and the books. She's the mother of dragons whose birth brought magic back into the world, and the rightful heir to the throne of the Seven Kingdoms. Not quite sure how that equates fluff...