Rooting for the underdog.

I have an issue and most people are starting to get on my nerves with this. But why does everyone have to root for the underdog? is it they desire change because thier life is crap? Is it just some stupid human desire to see someone who has not trained as hard or as long to win? is it that we want to be able to say that everyone we don't like is evil and the underdog is fighting for us? Then also who really is the underdog anyway? Do you cheer for Lex Luthor to defeat Superman? No we do not! Maybe that is self preservation though.
But why do we cheer on the guy that only got to where he is not because he was able to back stab everyone else that was better than him in the first place?
Examples of these things are mostly seen in sports. Like most recently the Superbowl. I wanted to see history happen by the Patriots making history by finishing off a tuff but otherwise undefeated season. But many people only wanted to see the Giant win soley for the fact to see the Patriots lose. Not that they were Giant fans all year, or that ultimatly the Giants were a better team. They just wanted the Giant to win just to see the Patriots loose. The Patriots who had worked hard all Season long to win every game. To do everything right on the field, and proved they were one of the best teams ever in football history.
Other examples of this I have seen have been in most every sporting event. Baseball, Basketball, Soccer, and even in the Olympics. But Sports is not the only place it is seen. Buisness is also a place where we cheer on the underdog. Not because the ultimatly bring us a much better product. But because we feel the Big corperation has done well for too long and needs to be de-throned.
I see this mostly in Game forums myself. Most notably recently is many game geeks that Bash Sony, then Microsoft, But all praise Nintendo. Now I will admit that Nintendo is not an evil company. But they are not a saint company by any means. You might read my review on Nintendo. Mainly the Nintendo Wii. Although it is a ok system. I still see why it should be the underdog. It is a bad console compared to the the PS3 and the Xbox 360. They gave you a reboxed gamecube with another crapy controller. But people defend the Wii as if it was thier own child. saying things like Nintendo did not want to compete with Microsoft or Sony, Or Nintendo does not care about graphics. This is all a lie in my opinion for Nintendo because they tanked with the Gamecube and the N64 was not much better. Nintendo did not want to compete with Sony or Microsoft because the cannot compete with them. Nintendo only success has been in the handheld market for the past 10 years. Thier Consoles have been lacking. and so have thier games with those consoles. That is why you see a new Mario Kart and Mario game each time. Those are the only games they can do right each time. But We in the end see them as the underdog and so we cheer them on. Praise them for thier short commings and buy and promote thier underdone & underworked console.
So why do we Root for the underdog? They don't really do anything for us. They don't give us pride in our country, or the ability to see history in the making. They don't give us anyting consistant. I will root for someone to finish a race but not to win it. But they only give us a moment that in the end is not always the best.