Watching NFL football on TV or attending a game will not make you taller, thinner, or smarter. It won't improve your marriage, your relationship with your kids, or your golf game. In the course of human events the outcome of games, even championship games, means nothing. Give your heart and soul to your team and you will get back a national anthem protest and a brace of felonies committed by players.
To paraphrase Jerry Seinfeld, "You are rooting for laundry".
I never really understood the “our team” stuff for any sport. Its not like the team is going to perform better or worse. I think its a substitute for tribal behavior that has gone away from American life. People want to feel “part of something” but there are a lot of people who dont want to put in the work, so buying a jersey and cheering is easy.