Yeah maybe not the best wording. It’s more meant that ideally toast can be fully used with a cursor for interactions. I don’t think you can exit vim or emacs just by clicking on a button?
You can: emacs has a menu bar and you can quit emacs that way. If you write code in your .emacs.d to turn off the menu bar, then I think you can be trusted to use the keyboard to quit emacs.
I think you're learning that Toast exists due to "skill issues."
Vim has full mouse support. Not only can you exit, but you can even save using just the mouse.
You absolutely can exit Emacs by clicking a button! Even when it is running in terminal. You just need menu-bar-mode (which is enabled by default) and enabling xterm-mouse-mode (which also should be enabled by default) - https://asciinema.org/a/rprH0gLSkrUz2cqr