Have you ever approached an intersection governed by a stop sign to see another car already waiting at one of the other stop signs?
There they sit. Stopped at their stop sign as you approach. And they wait. And wait.
And you finally arrive at your stop sign. But instead of being able to stop and go, you now have to wait for them to go.
They could have gone while you were approaching, but instead they sat there. Now, instead of stopping and going right away, you now have to stop and wait for them.
If everyone simply follows the rules of the road, all will go well.