You're right that there's some irreducible aspects to even GUIs that isn't intuitive and you just need to be told how to use it once, but GUIs have an advantage

You're right that there's some irreducible aspects to even GUIs that isn't intuitive and you just need to be told how to use it once, but GUIs have an advantage in that the overall 'language' of those things is far more limited at a basic level. Once you've figured out that mouse movements correspond to moving the pointer, clicking your left button usually means you want to do the primary interaction with whatever you're clicking on (opening a program, pressing a button, checking a checkbox), and right click gives you additional things you can do with the thing you're right clicking on, you've figured out enough to be able to at least use the system (I agree you're by no means proficient in it though). To get comparable proficiency with a command line requires a much larger set of things to remember for even basic usage.