Skylight yes or no?

Hello,

we are currently planning the house.
We are getting 2 full floors and would like to have only part of the upper floor with a ceiling for an attic and the remaining rooms higher up to the roof.
I have already presented the floor plan here:

Now the question for us is in which rooms it makes sense not to install a ceiling and whether roof windows would also make sense there.
It is important to mention beforehand that we are deliberately not installing a controlled residential ventilation system (please no discussion about controlled residential ventilation here!).

Currently, the bathroom and bedroom are planned as follows:
-Bedroom: without a ceiling, thus a larger room volume which means more air in the hope that the air quality in the morning will not be as bad as if the room volume were significantly smaller.
At first, we wanted to have a roof window here, among other things because of the view of the stars. But since I have read more and more that many people cannot sleep because of the noise of a roof window when it rains, it can be unpleasantly bright during a full moon, etc., we have somewhat moved away from that idea.

-Bathroom: Our idea would be that I install a humidity sensor, as soon as the humidity in the bathroom exceeds a certain point, the roof window opens (with a slight delay). Steam and warm air rise upwards, so a roof window should be optimal here, right?
An acquaintance then said again that it would be better to have a ceiling in the bathroom so that the condensation water is not so high up??

What is your opinion?

We have roof windows in all rooms with sloped ceilings. I still find them good. However, it is important that they are equipped with electric shutters on the outside. This allows you to darken them completely. If they are at a great height, I would even have them open and close electrically.

I would not want to do without them anymore.

We are getting a skylight in the second bathroom because that is the only way to get daylight in there. It will also be electrically operated. Otherwise, the first thing that comes to mind with the large room volume is the increased heating effort. Therefore, I find a bathroom particularly unsuitable.

I am with Koempy. Roof windows provide a lot of nice light. You will certainly need electric drives, roller shutters, and rain sensors.

The bathroom tends to have the highest target room temperature in the house and is comparatively small, which is not always easy to achieve with underfloor heating and low flow temperatures. More volume to heat would probably be counterproductive.

In addition, I can say from personal experience that bathrooms with only skylights can really have problems when it snows. As soon as there is a solid layer of snow on the window, you can't open it anymore. At the latest, when it thaws and refreezes, it stays closed until it melts. Since you also want to do without other ventilation options, this should be clearly noted.

Thanks already for the hints. So we wouldn’t have just the skylight in the bathroom, but also a normal window. Heating demand with higher room volume is an important point, I hadn’t thought of that until now. Can you get the moisture out with a normal window that you tilt electrically several times a day alone?