Post Game Celebrations in the Wild Card Round?

Why is it that baseball is the only sport that has to celebrate after every round like they actually won it all?

In Hockey, Football, and Basketball they don't do it. Imagine if the San Antonio Spurs put plastic up in the locker room so they can pop champagne after a first round win over the Sacramento Kings. ridiculous right? So how bizarre is it that teams like the San Francisco Giants celebrate like it's New Years Eve going into the millennium after winning a wild card game against the Pirates. Act like you've been there guys. There is only on suitable time to pop Cristal in the locker room after a victory and that's after you win the whole thing! Anything else is amateur night.