Interesting, I would have considered the idea of pretending to be someone I'm not for extended periods of time to be far more harmful than any potential disadvantages I might experience in a busieness setting for being an introvert.
I don't think any undue stereotypes around the introversion / extraversion dimension come from Jung, but have simply been attached to the concept by ill-informed society. It's hard to fault Jung for this. Introversion / Extraversion is also part of the Big 5 and has more substantial scientific backing than the foundations laid by Jung.