Could you elaborate on why the GUI killed the possibility of mainstream programming? I'm not exactly sure if the concept of what programming is (in an abstract

Could you elaborate on why the GUI killed the possibility of mainstream programming? I'm not exactly sure if the concept of what programming is (in an abstract sense) should be bound to the idea of a CLI. In my opinion the use of a GUI vs CLI is more of a preference and doesn't explicitly assume the user is ignorant.