"Like she decided that, sure, superheroes need capes, everyone knows that, but come on, she's seen The Incredibles..."
...except for the important fact that Kryptonian + jet engine = a lot of broken metal pieces, and an alien who's hair is a little messed up.
That always bothered me. For flat-scans, sure, capes aren't always a good idea (and it entirely depends on the style and fabric and attachments), but when you're dealing with characters like Thor or Captain Marvel or Superman or Wonder Woman -- who the hell cares what they're wearing? It won't make all that much of a difference either way.