Because it respects the “unoccupied wall” principle. A dining table and 4 chairs allows the homeowner to “bias” the table toward a corner or a wall, freeing up a major thoroughfare. By removing just two seats, you regain roughly 1.5 square meters of vital floor space that changes the entire energy of a kitchen-diner. When using a dining table and 4 chairs, the room “breathes” because the visual weight is concentrated rather than spread. It allows for one side of the dining set to remain flush or near-flush to a wall when not in use. This flexibility is the hallmark of a successful dining table set in a modern flat. You aren’t losing seating; you are gaining a room that functions as a living space rather than a storage unit for unused chairs.