Sure, but your !! command isn't reified. Any edits you make to a command plucked from your command history aren't reified.

I didn't say anything about using a mouse to interact with the CLI - copying and pasting don't require a mouse, but they do require a UI through which you can see what you're selecting and copying, even if it's just cursor key driven. And it's the original article which suggests copy/pasting commands from web pages or docs into your CLI, as well.