>>150024923
Idiot, that would look terrible.
Have you ever seen a tv show or play? When two people are on screen do they look directly at each other?
No. They cheat the camera.
>>150026592
This. It could be worse, I mean it's not like a 90% mix of over the shoulder and close ups shots done in a shot reverse shot manner, we can actually see the location.
>>150024883 (OP)
The 3/4ths pose originates from theatre, where the actors position themselves facing the audience to be clearly seen and heard regardless of whether or not such positioning would make sense. Its use then spread to television, which frequently featured live audiences as well, whose static camera setup mimics the viewing arrangement of theatre.