You used to have to journey cross-country. A Command-Line Interface Is Inherently Superior To A Graphical Interface. But I fully believe it is true. Because a command-line interface is based on language. And words are more powerful than pictures.
Pictures are easier to learn.
They can be understood with less training. But words are more powerful. Consider an analogy. If I travel to the Istambul, I can learn a few words of Turkish or Arabic, and go to the open markets to buy food and other necessities. By pointing at things, and using fingers to negotiate prices, I can get along with minimal training.