The 2% who misunderstand you
Sometimes, it's essential that you be completely understood. That every passenger knows where the emergency exit is, or that every employee knows how it is we do things around here.
But most of the time, if 2% of your audience doesn't get the joke, doesn't learn what you seek to teach them, doesn't understand the essence of your argument, it's not the problem you think it is.
Sure, the 2% who are underinformed can write reviews, tweet indignantly and speak up. You know what? It doesn't matter that much.
If you insist on telling everyone on the airplane precisely how to buckle their seatbelt (!), then yes, of course you're going to not only waste the time of virtually everyone, but you're going to train them not to listen to the rest of what you have to say.