I don't think it's meant to be taken that seriously. And his point is that normally most forms of advice or general thoughts on the matter praise extraversion while introversion is seen as something to kind of change.

Like when he advises not to ask someone wha'ts wrong I thought was really on point because there's many times when either alone or with people who were discussing something I found a little boring that I'd sort of get lost in my own thoughts and people would always ask me that when I was perfectly fine. So I think he's just trying to clear the air that it could an introvert could be really misunderstood and instead of trying to change it just deal with it.

He wrote it because culture usually does put extraversion as the default and he says extraverts make up 3/4's of the population.