There actually is a text editor in there somewhere at least if you believe some of the MIT neckbeards. But you have to sort of tease it out with the proper meta key what-have-yous
You can install vi into emacs, and vi is the best text editor.
You can however use a facsimile of Vim called Evil.
i once had a fax machine running on emac
You can always open eshell and run ed(1), as it is the standard editor. ;-)