As someone who has experienced both the school system and homeschooling (by choice, rather than due to the pandemic) for my children, something I learnt along the way is that education doesn't always have to be in a formal setting. Also different settings work better for different children, depending on their learning styles and personality.
1.- Bedrooms or bedrooms are not for studying
For younger children, I agree. Even with a desk set up in there, my girls preferred the living room floor. They hated sitting still on any tale or chair. Perhaps their experience in the school and having to sit (often bored) for long periods put them off. Being on the living room floor gave them a certain freedom to move around as they wanted and, surprisingly they absorbed information better this way.
As they got older this changed. My eldest liked her personal space and her bedroom was it, so she would do nearly all of her work there, even her homework, when she went back to school for about a year, except when she felt she wanted company. Then she'd come out to the dining table.
My youngest (now nearly 18) does her work at a desk, but this is through official channels for highschool and she does indeed seem to have chosen a space as you describe.
Another key point is found in the age and learning style, my son was hyperactive from a very young age and was easily bored of the spaces until we were building together a place where he could find his concentration, hence the importance of allowing them to participate in choosing the right place for study, today he is already a young man of 19 years and although he does not live with me where he is, he tries to have his place of peace to do his academic work.
In my country, most of the schools have a design inspired by the old army barracks, they are grey and cold spaces, not at all favourable for studying. One of the things I like to tell parents is that it is not about a formal space, but a pleasant space that is ready for study, because in our growth, the modelling of behaviour has a lot to do with the environment.