First of all, what is the bathroom for? It is a place to solve personal hygiene and excretion, and it is a smelly and humid place. Therefore, we should try to be separated from other spaces in our home. Our ancestors also put the toilet outside the house! Modern architecture has to put it in the house because of conditions. But it is isolated by various methods, so that its moisture and odor are not discharged inward, but discharged outward. In order to isolate moisture and odor, brick walls and waterproof layers are used. Replacing the glass wall can also achieve the same effect of isolating odor and moisture, but the heat insulation effect is not good, and water vapor will condense in winter, causing some trouble.
The most important thing is people's mood. When you enter the bathroom, you have to relieve yourself or take a shower. It is inevitable to take off your clothes. Facing the relatively tight and thick brick wall, people who are naked inside are more relaxed and feel more secure when using it. If it is a thin glass wall, even if it is covered with curtains, what kind of mood will the user have? It goes without saying.