Well, all language has this fault that if you don't know what the words mean they don't convey anything. But you can learn what they mean and now you have a new

Well, all language has this fault that if you don't know what the words mean they don't convey anything. But you can learn what they mean and now you have a new phrase to easily communicate an idea to other people who also know what it means. If you work with people from a country where baseball is not popular you might find that the phrase "ballpark figure" doesn't mean anything to them. That doesn't mean we need a finger-wagging article about how nobody should ever say it.