I don't see how "emotional response" outweighs "valid reason".
The whole point of sports is an emotional response. Without the emotion, I wouldn't watch sports at all. Rationally speaking, being a fan of the 49ers who has broken multiple remote controls from throwing them across the room in a fit of anger because the 49ers lost/made a bad play/whatever is completely and utterly stupid.
So if you're going to bring rational thoughts into sports and discount emotional responses, you are negating the very essence of sports and reducing it to nothing worth talking or thinking about at all.
In other words, you're stupid.
(They "you" above is MotionMan. Who is stupid. But is a Niners fan, so I like him anyway.)