Earlier quoted context omitted.
No. A shell is any user interface. Windows shell is explorer.exe and it used to be possible to change that via a config line in a system INI file. SSH protocol also isn’t just for CLI work. It supports file transport (eg SFTP), TCP/IP forwarding and even SOCKS HTTP proxying. You also used to be able to run GUI applications over SSH via X11.
You have a very loose definition of a shell that conflicts with about 40 years of history.
> Cairo, like Chicago, had a new shell (Microsoft’s favorite word for the user interface for launching programs and managing files) and a new file system
https://hardcoresoftware.learningbyshipping.com/p/020-innova...
When I worked at Microsoft 2010 - 2014, the word "shell" was still used in this way. I decided to say "graphical shell", to make it clearer.