is about is right there in show's unofficial, yet still sort of official, theme song, "Carry on my wayward son, they'll be peace when you are done..." Supernatural
is the story of two brothers, Sam and Dean Winchester. It's their story and really always should be their story.
Supernatural shouldn't be limited to Sam and Dean's experiences as hunters. The Supernatural fan base is predominantly women and it's about time that they start being more represented on the show. Supernatural may be about the wayward sons, but it's about time that the wayward daughters get equal footing.