They only play out awkwardly because one or both of the participants don't remember the rules.
And yes, I agree with the inexcusable example you gave -- it's like the person who stops dead to let some car left turn through traffic. "Oh they've been waiting a while and I'm not in a hurry today I'll be a nice person" Yeah that's great for you but you just caused a damn traffic jam behind you and maybe someone behind you WAS in a rush. You just inconvenienced upwards of a dozen+ people to help one person. You were a net loss on society's progress in that moment.
And yes, I agree with the inexcusable example you gave -- it's like the person who stops dead to let some car left turn through traffic. "Oh they've been waiting a while and I'm not in a hurry today I'll be a nice person" Yeah that's great for you but you just caused a damn traffic jam behind you and maybe someone behind you WAS in a rush. You just inconvenienced upwards of a dozen+ people to help one person. You were a net loss on society's progress in that moment.