Because the smarter you are, the more you're aware of how little you really know. One of life's most important lessons is to take a moment before you speak, because what is very true for a lot of people is that the smarter you get the less you speak.
add some 'feeling' and intuition, and you understand that the person they lie to the worst is THEMSELVES. Who wants to be another person's emotional forklift? And how many times do they have to repeat the same harsh