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.
You can't change your situation but you can change your attitude in how you decide to see it and take the actions from there that's beneficial. Choose to be positive, find strength, be the better person. Be the better you.