> essential functions like showing hidden files in a directory
How is that an essential function? My mom has never needed it in 20 years of using Macs. And when I want to know about hidden files, I pop open a terminal and ls -la.
Precisely. Just as the "Go" menu in the Finder doesn't contain the Library folder, because the user generally doesn't need it. As an advanced user, you can pop open a Terminal and `open Library`, or you use a shortcut: press Option while in the Go menu.