Just installing 6 windows like that is nonsense.
Basically, we are talking about unlaid eggs here: you can tell from the dotted lines that the positions of the roof windows are just possible suggestions on how you could (or should? ;)) do it.
So if you don’t want to, you probably won’t get the indicated elements either.
However, they are not entirely pointless: a studio in a house is and can be a one-room apartment, meaning a room with multiple functions. In that respect, I find the roof windows for different living areas, which would need to be separated, quite sensible.
Use: attic studio (play area for children, additional study, TV room, etc.)
It says here as well: if you want to separate, the areas need light.
But not only then:
Aren’t 6 roof windows too many? Maybe you have experience.
If the room always stays as planned and you want to use it as living space, i.e. a room for staying in, then you have to say: they are definitely _not_ too many!
90 sqm of living space requires several sqm of window area.
If you then also consider the length of the house/room and the rather dark roof slopes, we are talking about accordingly more window area. (I have deleted my 7.2 sqm and 9 sqm here because the roof slopes make the room smaller, but they also don’t make it any lighter.)
So, with these windows, there is no "oh, how wonderfully bright" exclamation yet. It is simply necessary, to illuminate the room, soberly said.
In this respect, the architect has done a good job technically by drawing it in.
If money is available, I would fully glaze the gable ends and place two roof windows in the middle. If not, then don’t call it a studio but rather a converted attic.
Then gladly with 6 larger roof windows.