Wow, oversimplify much? I happen to much more on the extrovert side of the spectrum and while, yes, people do sometimes talk about themselves at social gatherings many of us, myself included, also make an effort to hold an actual back-and-forth conversation. It's unfortunate that your experiences have been so negative but don't classify all people based on that.

Though let me just say that:

"this advice is sabotage, created by extroverts to make introverts easier to spot so the E's don't have to spend as much time trying to engage us and can just move on"

Sounds like "Toot, toot, all aboard the crazy train!" to me.