When we attend a sporting event, we hope to see greatness. We don’t want it to be "just another game", we want something special to happen. We want to witness greatness.
What is greatness? The term is probably loosely defined depending on who you ask, but for a baseball fan it’s probably witnessing a perfect game. At the least a no-hitter. For a basketball fan, maybe it’s seeing a quadruple-double in person. You get what I’m saying, though. We want to leave the venue knowing that what we just saw was incredibly rare and it may never happen again to us in person.