Because video games are meant to be played for fun -- though today's generation seems to have forgotten that, and developers perpetuate it by coddling the lowest common denominator. When people treat video games like some super huge competition or "sport," it kind of ruins the magic of what gaming once was. A friendly, fun competition is fine, but people are out for blood these days, and it kind of makes me sad.
So why do I freak out? Because people aren't willing to play for fun anymore. Instead, they play to win and nothing else.