While I do believe that gender stereotypes play a role in many instances, my personal experience with my daughter has been that the physiological differences between the genders play a huge role. And before anyone tries to argue there are no physiological differences, talk to a doctor about hormonal differences between men and women and instinctual reactions to varying stimuli.
In the case of my daughter, I specifically went out of my way to avoid a focus on princesses and baby dolls for the first year or two. I did this to the point of putting away gifts of this nature. Her very first stuffed animal was a dinosaur. Her first toy was a car. She has Megablocks and access to video games. Before she was born I would play racecar engine sounds on my wife's stomach. I would have her sit with me to watch car races. We take her to railroad museums and car shows.
Nearly five years into this social experiment and she loves Frozen while Cars bores her. The most recent toy car I bought her at Petit LeMans, at the beginning of this month, has already been set aside. That isn't to say that I don't see the affect I had. She will get excited when she sees a racecar, but it is especially exciting if it is pink or purple. She wants to run and jump and climb trees, but she has a 50% chance of wanting her Elsa or Barbie doll with her. She sits with me and watches Justice League and similar cartoons, but if she has control of the remote and I don't suggest something she winds up watching something with princesses, fairies, Barbie, or Bratz (which is clearly created by men. Have you seen what they are wearing?).
That comic is so oversimplified that it ignores one big factor: If the girl had the boy toy would she magically have a higher tendency to be an engineer?
Fact is, there are differences in genders as well as individual tendencies. There are things my daughter likes that no one in our family or any of her friends enjoy. She likes dancing and music. No one we know dances (with exception of the people we met at dance class) and I only sing Christmas Carols...badly. Her teacher has mentioned that she will occasionally join the boys playing blocks and whatnot, but it is not very frequent. Perhaps my attempts have had some effect, but once we opened her up to both gender typical toys she went in the female direction.
I also think that we are being prejudiced and stereotyping in what we expect a car enthusiast to be. If she doesn't show up at the car show or can be seen under the hood we don't think a female can be a car enthusiast. Fact is, I know plenty of girls who can talk about cars, enjoy sports cars, and own enthusiast style cars. But the woman driving a Corvette doesn't show up at the car show or track and so we write her off as just being another Paris Hilton. Females approach the enthusiasm differently. I found out a year ago that actress
Lake Bell had a father who was a car guy (he reopened VIR)and she is a wrencher herself. But she doesn't go around showing it off. Few people know she writes the automotive column in The Hollywood Reporter.
I think the better question some should be asking is why you don't recognize a female car enthusiast.
Ultimately, what is more offensive: recognizing that the genders are different and that can affect tendencies to like certain things or expecting people to fit such a narrow view in your definition that you don't see when someone has a liking in an atypical gender preference? Are we being too White & Nerdy to allow us to see a female car enthusiast because she won't fit our narrow preconceived notion of what a car enthusiast must be?