Agreed, surely if there's one button in a GUI that will just do the thing you need (say, spitting out a PDF version of the document you're editing) but you'd otherwise need to recall multiple command-line programs, options, and/or arguments.

However, often I'll open up a GUI I haven't used in a while and feel like I'm just as lost as I am with a command-line tool I haven't used in a while. I rely on notes I've taken and try to stick with stable software.