Because it's literally the least impressive thing you can build and in a world where I don't write the code anyway, a "hello world" example has lost its place (at least for human viewers).
It's not meant to be a showcase of what you can build with it; it's meant to give you the smallest complete application so you can get a good idea of what you need to know.
The thing that's meant to be a showcase is usually referred to as a Showcase or a Gallery.