Why do people have to yell during a football game?

I want peace and quiet during a football game and today at the bar when the Steelers game was on, PEOPLE ALWAYS SCREAM AND SHOUT AND GET WAY TOO EXCITED!!! It is too loud and really scares me people are always yelling and shouting at the football game at a bar!! Why can’t people just be quiet during a sports game and talk more softly? Why do they have to get so excited during a sports game and actually yell that loud?!!!!!!