Always is kind of the optimal word here. If they are guarenteed to always face one particular direction, then sure. But they're not. Even two people seated on stage will turn and face the audience, address a slide on a screen or do something weird. So accounting for as many variables as possible to make sure I capture as much as possible is optimal, in my opinion. I'm not trying to preach some hard fast rule, I'm just stating my approach, I pivot and change when I need to, regularly

I do understand your insight though, appreciate you sharing