I remember having a somewhat difficult transition from a keyboard editor to Word, Notepad, etc in the 90s. I didn't use EMACS but a similar one called EDT. I had used it so much I never thought about which keys to press, it was more like playing the piano - my fingers knew how to do what my brain wanted. Moving a mouse around and watching the cursor are additional mental activities you don't need with keystroke editors. This is one reason many Linux users are still hardcore command-line users. They get stuff done a lot faster.