Originally Posted by American Maid
The purpose of Darcy's character is to help members of the general audience, who are not well versed in the entire history of the Nine Realms, to relate to the material. She may be useless to many posters here, because they are quite familiar with everything related to Thor and are already into it. But that doesn't mean she has no purpose at all. She helps expand the audience beyond that which reads the book, and therefore helps the movie to be more successful.
And who could fault Marvel for wanting more people to enjoy the MCU?
Elitists who want ego-cred for being better than the GA?