There's some level of GUI compitency or fimilarity - we have an understanding and expection of where menus should be and how they should work. I'd argue this is

There's some level of GUI compitency or fimilarity - we have an understanding and expection of where menus should be and how they should work. I'd argue this is also the case with ncurses like software too - in fact a lot of programs support emacs style keyboard shortcuts. You're also missing the distinction between keyboard shortcuts for a TUI and a CLI. Given a level of terminal compitency I'd argue that a CLI isn't any harder or is often easier to become compitent thanks to the UNIX philosophy.