Because if you didnt have emotions life would be pointless and empty...
That is a dumb thread though... "unfortunately I have experienced pain, love, sadness, etc."
What is unfortunate about it? I'm glad that I've had the different experiences that I've had during life. Without emotions things would just exist two dimensionally, without any flavor or spice to things. If I didnt have emotions I wouldnt want to live.
I, too, have questioned this. To live with higher thought processes yet to be without emotion...this would make us no better than animals. In fact, we would be worse--imagine everyone around you dying but you not caring. We would not survive. If every single person was focused only on himself, going through life only surviving, never stopping for fun or socialization, we would waste away.