Why Can't You Just Be Happy?

I know it's totally just a movie but this one line is too true to ignore. In the Matrix, Agent Smith explains a little about the computer program all of the trapped humans think their "real" life is. He says that they tried many versions of the program. They had peaceful utopian worlds with no war or destruction but we rejected them all. We accepted this world of pain and misery because with out it we have no way to measure happiness or reality for that matter. It's what drives us to be better. We work hard so that we will be prosperous and happy, not poor and sad. What the hell would we do everyday if we were just happy go lucky all the time? I would be sitting on a beach somewhere sippin' on a Mai Tai. actually ... I think I just might do that.

So no, we can never just be happy. It would bring our world to a stand still. I'm happy with my life but i still am not happy all day long, things aggravate me, I get hurt, someone dies, arguments, rambling... ugh I don't know. Maybe I'm a pessimist (or a realist.. it's the same thing).