Probably because the World Cup IS bigger than the Super Bowl. Trust me, this is going to be massive at ATT Stadium. As an example, I was in Cologne, Germany in 2014 when Germany won the World Cup that year. The entire Haufbrau was absolutely buzzing and there wasn't a seat to be had for those that didn't get there and hour before the match. The German flags were all over the bar, and the excitement was palpable. It was like being at a stadium. When Germany scored, it sounded like being at the stadium itself. When Germany won it, there was no sleeping that night as the horns were honking, and the party the Germans threw that night was amazing. Also, Go England for the World Cup, and Up the Cherries (AFC Bournemouth) on club level.
Arlington is about to learn what a party is, especially if it's a European country or a South American country. I hope the likes of England, Germany, and Italy get to play in the stadium. They can teach Jerry how passionate fans can get. It's truly a memorizing experience.