This is a great write-up. It's exactly what I learned later in life than I could have. A specialist is far more valuable than a jack-of-all-trades. There is nothing wrong with hobbies, but time is, arguably, the most valuable of our tools. A person highly skilled at their trade will do a better job in less time that someone who is not in the top half of their trade. I can add that there is something that life experience instills in a person that can be gained by no other means. This can positively affect any and every part of your life between the professional and personal.