If you combine your post and the GP and the article itself, there is an interesting insightful result that culturally we indoctrinate our youth such that only extroversion is acceptable behavior and introversion is morally and ethically wrong perhaps worthy of clinical chemical intervention and definitely worth of derision.

However, at some point in their lives, most introverts take the red pill, say "F that" to the intensive cultural indoctrination, and move on with their now very happily introverted lives, they smile while reading a book or meditating or doing their hobbies or whatever floats their boat. Some take that red pill before they graduate and have a rough time in school for obvious reasons, others might not take the pill until they're retired, but "most introverts in our society take the red pill, WRT to introversion, in their 20s" is a tolerable disprovable scientific hypothesis that leads to a lot of very happy introverts in their 30s and up while simultaneously resulting in a lot of bewildered lonely extroverts in their 30s freaked out wondering where everyone went to and how will they survive without their vampiric victims, er I mean "friends"?

So lets say 15 years ago sotojuan's girlfriend for social / cultural reasons was intensively socially culturally pressured into playing soccer with the article's author or maybe they would have been in girl scouts together or cheerleading it doesn't matter in detail, the point is they were together as kids because society forced them together for various reasons, making the article author very happy (and probably not making sotojuan's girlfriend very happy, but culturally introverts are hated, as much as white males if not more, so there's no problem there) And now because someone took the red pill, sotojuan's girlfriend is assumed to be happy hanging out with sotojuan resulting in the article author being very lonely "uh, isn't the girl scout troop leader supposed to assign me a partner?" "Hello, coach? Wheres the rest of my team?" "I'm living the way society says I'm supposed to live, now why is the other half of the contract not being enforced to make me happy?". Because the women involved are not 10 years old anymore, the original article author can either be sad, or get drugged up, or work a whole heck of a lot harder than she's ever had to work before, or take the red pill herself (can people convert themselves to/from introversion or extroversion?).

Something interesting to think about... nobody likes to be told to toughen up or work harder, so this explains the intense discrimination against introverts... At age 13 it seems to serve no purpose other than to psychologically torture innocent kids, but it actually does have a purpose when bitter extroverted cat ladies get lonely and angry in their 30s or whatever. The "mean girls" of the 2000s movie are going to be lonely bitter cat ladies in the 2010s or 2020s unless they effectively indoctrinate their cohort against introversion. True, that kind of action is about as likely to succeed as "praying the gay away" in other words they're pretty much doomed to fail, but certain failure never stopped a true believer from doing something dumb before nor will it ever stop them in the future.