When bathrooms are put into places they are not intended there might not be room to do certain things, like shower doors.
This shower opening is so narrow that a sliding door might leave too small an opening (15") for some people to fit through.
The alternative to a door is a curtain.
When a curtain is employed, it must be situated so that it actually seals the opening all around. If not, it can leak.
Hardwood floors do not handle constant wetness well. And it takes a while for what you see in this photo to happen.
I noticed the floor before I entered the bathroom. It was cleverly hidden under many bathroom rugs, which you can see in the foreground. The bulge under the rugs and the toilet listing like the Titanic was a sure give away.
When I first entered the bathroom I had not yet seen the decorator's touch on the walls. Or the constantly leaking "shower" tube coming out of the wall. Continual splatter from that will also damage a floor.
This toilet has been lifted up so high the wax donut (which seals the gap between the toilet and the toilet flange) has opened up and there has been leaking around the toilet base as well. It is only 6" or so from the shower.
All in all, this "bathroom" was a mess.
My recommendation: When there is a bathroom in spots that don't look right, they probably are not right. And often that portends problems down the road. This "bathroom" is curtains...