Why do sofas have low backs?

Why do sofas have low backs? If you have a smaller room, a lower back keeps the space looking open. Lower back furniture is also good to buy if it’s going in front of a window and you don’t want to block the view.

If you have a smaller room, a lower back keeps the space looking open. Lower back furniture is also good to buy if it’s going in front of a window and you don’t want to block the view.