@transscribe That's a tricky one. I used to get very anxious (and still do a little).
So I, myself, would not have used a shower like that before / without bottom surgery. I would just be too uncomfortable and anxious. I would find somewhere else to shower. I'm not telling you to do this -- it's simply what I did because I couldn't manage any other way.
After bottom surgery, I don't care -- I just sashay where I need to go in the change room and try not to worry about it. 😄