Giving people near and far the benefit of the doubt as often as possible about the little mundane things in life helps make you a force for good and the World, in general, a better place.
In the final sum of things, though, it probably helps you most of all. It helps to keep stress levels low and keeps you focused on more of what you want rather than fussing about all you see that you don’t appreciate.
It helps to realize in advance the kinds of relationship transactions you prefer and to appreciate them when you see them. You can also lean towards patience with others by knowing that everyone is doing the best they can at the moment, just like you are.