If you do a lot with your keyboard, it is annoying to get your hand off it and switch to your mouse. And then to switch back. If a task can also be done with the keyboard, you can just stay there and that is quite comfy.

I don't ruthlessly reduce mouse use, but I prefer to stick the keyboard for a handful of reasons: speed, comfort, reducing the likelihood of repetitive stress injury as I age, and flexibility. If my trackpad fails and I can't find a mouse, I can still do what I need to do.

i think the question is valid: it seems strange first, but the cli-env. is so MUCH MORE POWERFUL.

For the ableists in the room: to reduce mouse usage.