Because we do not want to make the necessary compromises.
We simply do not want a WC door in the red area. Not at all. Dirt, too close to the door, etc. We now have a WC right at the door. It is the fastest to reach from the kitchen and living room. We do not use it and prefer to walk 3 meters and one door further. So this is not just a figment of imagination, but our reality. If we were to build it like that, we would probably always go upstairs instead. It was the same on our trip to Denmark, the master bathroom was right at the wardrobe, only the spare bathroom upstairs at the end of the corridor was used.
The yellow area is an acceptable compromise for me. I would have liked the door at the end of the bathroom, but I was outvoted. Personally, I would also find a 45° wall for the bathroom entrance nice, but I am probably very much alone in this.
in dem man dann auch gern arbeitet.
That’s your projection. I like my dark little room. I have a 49" monitor and a monitor on the wall. When I am at the PC, I don’t look at my room, at most out of the window for my eyes – here the roller shutter is usually closed 75%. When I play games everything is dark anyway. I like it that way and simply don’t want a bigger room. I find a small room rather calming. And that way I don’t have to use half a home office and half a storage room.
Not that I don’t know it: in the office I have a "beautiful" 300x450 cm corner office on the 5th floor. It’s just not for me.
Of course, objectively seen, we lose space. But in our hierarchy and weighting, this is so far the optimum.