GUIs can have keyboard shortcuts. Have you honestly never pressed Alt+F, x to exit a GUI program or Ctrl+S to save a document in a GUI editor, or Ctrl+Tab to switch tabs in a GUI browser or Tab to move focus between fields, or the context-menu button next to Alt Gr and then a keyboard accelerator key for the menu, or Ctrl+C then Ctrl-P or anything?

Repeating the same actions in a CLI with no readline is an exercise in frustration, but ... that's not what happens most of the time.