Some are introverts, not by their doing. Some are confident while others are anxious. And no amount of motivation can transform a genetically anxious person to muster just about enough confidence in the face of uncertainty.
So, maybe we are allowed to believe that nature had primed some for success, some for average, and others for failure. Flawed is this belief.
Although extroverts may be social geniuses, they are one side of a coin. Confident people appear admirable but they are more likely to take deadly risks. Very organized people may be slower as they pay attention to details around them but less organized, carefree people are always in motion, maneuvering their way through.
Your genetic compositions may set you up for failure in one area of life, but it primed you for outstanding success in another. It’s your responsibility to find where you fit.