Vim is a text editor, not a category of text editors. Neovim is another text editor, forked from Vim to allow a more ambitious roadmap and a different development model.
While they are still largely compatible they simply aren't the same thing so they shouldn't be called the same.
Ubuntu 18.04 symlinks /usr/bin/vim to nvim when you install Neovim, so it kind of calls them the same.
But ok, I agree that technically they are 100% different