There is a segment of the American population that has been excluded from the national myth, and that should be redressed.
Then it was that the exports of slaves from Virginia and the Carolinas was so great that the population of those States remained almost, if not quite stationary.
We don't want to make little pop culture ephemera or confections, that sort of thing, and so 'ParaNorman' like 'Coraline' has something meaningful to say.