I’ve lived here over a decade with no shelving in the shower, and I finally bought an organizer! This has been a huge quality of life upgrade, it’s great having everything off the floor within reach. The shelving was super easy to install and I feel dumb tolerating the situation for so long.
There’d be two shelves, all packed full, plus more on the floor and seats. OP is not married, at least not to a woman. Or, they have separate baths.
At least now they are on the right track for inviting someone over.
Relevant reference: https://www.youtube.com/watch?v=DOoUWmM9at8