Dunning-Kruger Effect
Dunning Kruger effect is a cognitive bias in which a person has an exaggerated sense of his abilities and expertise.
Millions of people suffer from this bias. For example, a person who has yet to spend much time honing his chess skills endeavors to start a mission to teach the next generation of chess grandmasters.
Sometimes, people just do not make a cut for a particular job or new venture. This often happens because their personality type does not match the personality required for that venture.
The best a person can do is to take a personality test like the Briggs-Myers test and get to know his personality. In this way, that person would be doing himself a favor, and society, too, would gain from his contributions through his expertise.
Let's face it. An introvert and a highly sensitive person cannot be a good politician as politicians usually face a lot of social anxiety, and they are generally under the scanner of the public. But, this person may have artistic skills and be good at writing, music, or poetry.
Even if a person learns his personality type, the importance of hard work (smart work in many cases) cannot be understated. One needs to spend hundreds of hours gaining knowledge and testing his knowledge in the real world so that the next generation of great personalities takes society forward.