Try installing legacy fat client applications on a locked down Windows desktop machine and you will see the uniqueness..
No-one else makes it anything like as difficult to install their database client when you have to install the whole 1.3Gb of dross, most of which you will never use, in a non-standard location. (24 years on, and Oracle *still* havent figured out "Program files"). (Oh, and you cant use program files anyway, because some things in there dont work properly if you have filenames with spaces)
Or the fact its basically impossible to install on a headless server without installing X and all its libraries or VNC,
Or the fact its so uniquely embedded in so many places, people dont dare rip it out despite Oracles "Innovative" and "Unique" pricing structure ...