That’s just ergonomics. You are shooting with a long lens. Unless you have the camera on a tripod/monopod, it’s much more stable to have the camera braced agai

That’s just ergonomics. You are shooting with a long lens. Unless you have the camera on a tripod/monopod, it’s much more stable to have the camera braced against your body with the viewfinder up against your eye, versus trying to hold 5 pounds of very long lens at arm’s length. (Nikon 200–500mm lens in this case. Trust me. Way easier to support that chonker when it’s held close to the body when running around to shoot rugby.)