It turns out that my initial impression wasn't exactly wrong. I don't understand why it is so hard for some boys to understand that girls can make and play games as well. I have heard the term "Fake Geek Girl" thrown around a lot on social media, especially in regards to cosplayers and other con-goers. Memes like the one below can be seen all over the internet, inferring that you can only appreciate games if you actually look like the stereotype of a "nerd".
However, as this article puts so very well, the idea behind "fake geek girls" and #gamergate is all linked back to boy's fragile insecurities and gatekeeper syndrome rather than this being an actual problem in the gaming and geek culture community. Just as with any other passion, there is no reason why you should have to fit in with the stereotype in order to be able to enjoy your favorite things.
And heres another image just for fun illustrating this point: