Very good points. Listening is a HUGE part of leadership. It's very easy to fall into the charisma trap, but speaking is just a small part of the overall leadership puzzle. It's much easier to learn, think, and get the pulse of an organization when you're not the one doing the talking.
I came here to comment on the listening part, so I'll comment to you since you mentioned it.
The article says that being a good listener is an innate trait of being introvert. I must disagree. Something that is often considered innate in introverts is being self absorbed and self centered.
Introverts can stay quiet, that does not mean they're listening or that they care about what you're saying.
A good exercise imo to become a better listener is to repeat key things the person is saying, to really focus on their words. What comes naturally as an introvert is rather waiting your turn before you speak. Which is also an important component.
