Misleading Research on Introversion

How an Introvert Can Be Happier: Act Like an Extrovert  is a troubling article.  It takes conclusions from studies of limited groups that were not also filtered for preexisting conditions such as clinical depression where the individuals self identified as introverted and made sweeping conclusions.

The problems I see are this:

• Extroverts can seem introverted when depressed
  -There is increasing pressure for everyone to be the same and that is extremely extroverted, social and a team player
  -There is no criterea for defining happiness; if it's enjoyment of social gatherings as implied by the article, then it is biased obviously
  -There is much profit to be made of pharmecuticals to prescribe to half the human population who are naturally introverted to make them seem more outgoing so there is pressure to define extroversion as normal while introversion as mentally ill somehow.
  -It discounts the fact that introverts who are truly happy tend to be quite social as well.  They are not acting like extraverts, they are acting like themselves.  Introverted is not synonymous with reclusive.
  

The trend is clear.....and even HSP extraverts can be maligned by this trend as well.

Even though I don't agree with the title, the article is still balanced because people are giving counterarguments to that conclusion, like that acting against your natural traits depletes your energy and that society should value the natural strengths of introverts more. (Susan Cain)
As a sidenote, I usually don't enjoy myself that much when I go to a party, and the advice that is often given, i.e. try to socialise as much as possible, and never turn down an invitation, really doesn't work for me. My time is valuable and I don't think I should be spending it on things I simply don't enjoy, just to "fit in".