I see it differently.  Boy Scouts have always been boys (Yes, there are programs designed to include older teenage girls, but they aren't called "Boy Scouts").  Thus, if a "Boy Scout" is now a girl, which makes no sense to many of us, then maybe north is now south,  a knife is a canteen, a bunny is a turtle, etc.  The point of the cartoon is that none of this makes sense.  Does the writer mean to imply that girls will think a turtle is a thing that hops around with long ears?  I don't quite see how it's "dumbing down" to show objects with names that don't describe them.  Like "Boy Scouts" doesn't logically describe a girl.  Dumbing down would be showing a shoe with the word "shoe" under it.

It's not an affront to "all" women.  Some actually understand what the cartoonist was getting at.