Very often they do. Many of these internal applications are from mainframe computer times when interacting with applications exclusively via the keyboard shortcuts was the norm. In most companies, they never dared to remove those because the Power Users are used to them for decades.
Problem is, few people are trained directly by those power users so they never learn those efficient shortcuts. And they are never well documented.
I’d love to have one if I had the space. My toilet is roughly one square meter. For illustration purposes, that size, only less grungy. These are leftovers from how they used to plan apartment buildings in the late 19th century in Vienna.