> No one buys a TV and then arranges the rest of their furniture to sit close enough to fill their visual space. If the couch is 8 feet from the TV, it’s 8 feet from the TV.
It’s common on open floor plans / large rooms for a couch to end up in a completely arbitrary distance from a TV rather than next to a wall. Further setting up the TV on the width vs length vs diagonal of a room commonly provides two or more options for viewing distance.