In theory, absolutely you're right, it's much easier, and much more user friendly. Even if you have to type your command(s) in by hand, with tab-complete availa

In theory, absolutely you're right, it's much easier, and much more user friendly. Even if you have to type your command(s) in by hand, with tab-complete available in virtually every modern shell, it's quicker and more direct than fiddling through menus. Although in practice, and in personal experience, users have a tendency to become effectively illiterate as soon as words appear on a screen instead of a physical media. They've been trained to look primarily for symbols or keywords ("Settings", "Internet", etc.) and ignore all that "other fluff." They don't want to read the output of a command line to figure out what happened, they want a pop-up that gives them their answer directly.