Whenever you do something that you really like, you only focus on that, regardless of the amount of energy you are spending on it or the time you have been dedicated to that activity. This principle applies to a job. This is why one should always pick a job that is related to something he or she really enjoys to do.
Society imposes rules since you are born. You need to educate yourself from a very young age, follow a school system during the first 18 years of your life and finally go through college in order to get a profession. Certain factors such as money and prestige end to distract one's focus on the things that really matter. Which is enjoying life and trying to serve others by doing what you like most. The earlier you come to realize this, the best chance you'll get to engage in activities that fulfill your purpose in life. This is why people get jobs or engage in activities that are not as profitable as others.
This way one should focus only on his or herself instead of thinking about pleasing others or looking better for society.
