I don't find this convincing as an introvert. Dealing with shyness or being an introvert required me reading a few books and techniques how to deal with it. In the end that helped, but it was not as easy as just 'try harder' and took a few years.
I also wish I realised earlier that it was an issue that needed addressing, but no one told me that.
Overall the article seems to trivialize the issue in my opinion.
- Cues and Captivate - Vanessa Van Edwards (business-focused social skills)
- The Gentle Art of Verbal Self-Defense at Work - Suzette Haden Elgin (I actually didn't enjoy this one too much, didn't finish it, but I think that was a personal mismatch)
- How to Win Friends and Influence People - Dave Carnegie (a lot of the techniques are very, very dated and transparent when used today... but it's pretty foundational and worth a glance anyway)