If what a person does during the day is mainly interacting with text then they need a tool for working well with text. Possibly this is an editor window inside an IDE. Possibly this is a shell in a terminal emulator. However, dismissing GUIs out of hand and asserting superiority of CLI is wrong. Far more disciplines need a GUI to get maximum utility from their computers than can get by with a CLI. Designers, architects, actual engineers, artists, lawyers, etc.