I can’t tell if the background is a very clean real interior or a render, either way it makes no sense for it to be like that.
Everything about the scenes they used feels so intentional and designed its pretty ironic to have such obvious and weird flaw.
Those shelves are a design choice, people like to display things and they are interesting covers. I have shelves for vinyl because the art is cool. Also I think the backing can fold back to be a regular shelf