disability

There's only one good reason to add blatant ableism to not one but two Jane Austen monster mashups: Because you know that the audience will appreciate and enjoy it. I certainly wouldn't accuse either Grahame-Smith or Winters of vast cultural sensitivity, not least because of the horrific racism which runs rampant across the pages of Sense and Sensibility and Sea Monsters, so I think it's fairly clear that the ableism was not introduced in an attempt to be wry. It was added because, quite simply, the authors thought it was funny.