Because saying that a woman can't be a superhero based on how she looks isn't also misogynistic? It's one thing to point out unfortunate trends in female superheros (waif-fu needs to go), but it's entirely another to say that women (or people in general) can't be strong without having bulky muscles.

Scarjo isn't some tiny stick figure in the movies, she's obviously fit - she's just not She-Hulk.

And this pretty much fits with the character, the character's background and the character's preferred fighting method - aka using an opponents strength against them.