An extrovert is interested in the karma, he does not see the futility of karma easily. It may be easier for him to see that the results can be more than he can ask for and that his productivity may increase if he does not waste his energy in influencing or manipulating the results. If you go back to the Upanishadic times, the equations were different. A king in those times will go to a poor Brahmin and touch his feet for his blessings. The introvert was on the top and the extrovert respected the quality of his interiority.
Situation is totally different today.
Even the Swami today is known by his association with a politician. The extrovert is at the top now. The sadhus are valued because of the ministers company they keep but not vice versa.