This short post is aimed at students of CS but pursues the same theme. If you were an art or music student your goal would be to be good at ONE THING in TEN YEARS. If a music student that might be signing, composition, music theory, or playing a particular instrument. Any one of those things is very hard. Your goal would be to find that one thing you resonate with and then keep pushing your skills with lots and lots of practice. Sure you could become competent in the other areas, but your goal is to be a master of one. Similarly as an artist you would want to become great at one thing be it printmaking, painting, drawing, pottery, sculpture, or art theory. Maybe you become great at two things but if so you are a Michelangelo style unicorn and more power to you.
Even if you become great at one thing, you become great at it in your own way. For example in painting Monet wanted Sargent to give up using black. It is so good that Sargent didn't do that. This painting with Monet's palette would not be as good. And Monet wouldn't have wanted to do that painting anyway!