You are right that for able bodied people it's at best a gimmick. But it might be useful for people with limited mobility, who don't want to depend on other people washing them.
It's probably only that tall so onlookers can gawk at the pretty women's bodies inside through the transparent sides. If it were sitting on the ground, you wouldn't get such a great view.
Yes, the original prototype is obviously just there to show off the models. I was thinking about more practical and less sexy versions that might actually see production.
Yeah, for a production model you'd likely see the chamber dropped down to a reasonable height, and whatever is in the pedestal can be hidden behind an adjacent wall or under the floor or something. There's no real reason it needs to be up on that pedestal apart from just being visually impressive