Yeah, a single sudo mv command can easily be several steps in a GUI, possibly error prone too. Because if you do it in the GUI you have to navigate all the way to where the source file is, cut it, navigate to where it needs to go, paste it there. Or you can paste the command in a terminal, done in 0.1 seconds.

If I want some information from someone, I can cook a big oneliner to copy paste that will give me exactly the information I want instead of needing a dozen screenshots all coming from different places and programs.

As long as you can trust the person feeding you the commands, I can get just about anything working on your computer effortlessly.