Truth or dare

Y can't we understand each other?
The Human species uses dozens (is it hundreds?) of different languages to communicate. Still, two people speaking the same language may well misunderstand each other completely. Why is this? Why can't all people just say what's on their mind? Why can't everybody just be straightforward? You may say some things that are hard to hear... You may hurt some feelings... But at least your honest. Is it better to lie? To hide? To deceit? Maybe, for the person who's listening. But what about the one who's saying it (or not saying it)? Perhaps that person is missing out on something big, something important... The opportunity to be happy, and/or to be loved.
Life may be easier avoiding conflicts and not saying certain things, but I'll have it plain, complicated, as it is. I'll say what I have to say, when I have to say it, to whoever I have to say it. With one exception.