The assumption that there's something wrong with not interacting with other people eagerly and often strikes me as oddly egotistical. Other people aren't alive solely for the enjoyment of extraverts.

The "problem," if there is one, is that extraverts are uncomfortable and find it difficult to interact with introverts. But this is as much the fault of extraverted people as it is of introverted people. They speak a different language and need to meet halfway to interact effectively.

Due to the personality type, however, the extraverts see this as a huge problem while the introverts really don't care all that much.

What if we asked the obvious counter-question: Why are extraverts so threatened by anyone who won't interact with them on their terms?

Nobody asks that because extraverts get a pass on this; it's the introvert's fault when social interaction between and extravert and an intravert is uncomfortable.

I can see why that would happen but it's odd.