well it sorta just makes sense, the gui presents it as a folder, you can move things around in it like a folder, conceptually it presents them in a way to make you think they are physical things stored in a physical folder/box. cli it really just feels like you are using a string of characters indicating the desired file, it feels more like a directory that way, even if it always really is that way, just showcased differently in the gui.

brain doing brainy things, strings/lines vs pictures/labels