Emacs is a visual editor (which also applies to Neovim, btw). Ed is a command line editor. But even if we assume that "command line" means "terminal", then it would still be wrong to describe it as a "command line editor", in the same sense at is wrong to describe a computer as a facebook client.
You are confusing line editor with command-line editors. If you interpret command-line editor as editing the command line, emacs has eshell. If you interpret it as an editor from a terminal, it's that, too.
If you mean "line editor", emacs has batch mode.
Aren't all "line editors" also "command line editors"? Either way, that is not my point. I just wanted to point out that Emacs shoudln't be boxed into the same category as Vim, because while Vim ist most commonly used in a terminal, Emacs isn't.
That's a fair point, more precise phrasing would be "If you prefer a command-line interface, ..." which should be sufficiently vague to make almost everybody happy.
I'd still object, Emacs has nothing to do with command-line interfaces.