A pedantic thing to say, surely, but the title really should’ve been: “Linux Directory Structure” – ‘Linux filesystems’ (the title in the graphic) refers to a different topic entirely; the title of this post mitigates the confusion a bit, though still, ‘directory structure’ is the better term.
It’s either this fairy tale, or its flip side, the myth that ‘private vices’ somehow add up to ‘public virtues’.