I don't think you will find an "architect" behind that.
It comes and goes, has a lot to do with money. Everyone lived "open" plan for centuries as homes were generally one space. Maybe multiple floors, or 2 rooms per floor, one on each side of a central fireplace. Victorian time frames you started getting dedicated rooms (parlors, dining rooms, new fangled "bathrooms", etc). After that it comes and goes. People want to open things up, so they remove walls, then later folks get sick of smells, noise, etc from having one giant space, so walls go back up. COVID will probably be a major blow to the current "open plan" trend as people had to live/work at home, and having 2 adults, kids, dogs, all in one giant room trying to do stuff has been not good for folks, now they want an office room again, or a way to have noise/etc from a kitchen separated from other stuff again.
It's just trend and needs of a moment. Just like anything else in houses. Anyone trying to claim they invented open-plan or closed-plan would be lying. Also look at the cost of housing. Post War, houses got real small, both for cost reasons, and for cranking them out in a hurry. Lots of walls make structure easier to build, no need for big beams.
Now if this was some extreme concept, like stove needs to be in it's own room, refrigerator needs it's own room, etc, maybe there is someone pushing that. But I don't think I have seen anything like that.