Ah, the declining, politically-correct NFL. I’m sure the vast majority of football fans in the United States are big Lady Gaga fans.
They aren’t worried about entertaining the vast majority of football fans, those people are already going to tune in and watch the game. They’re trying to hook some other fans, get them to watch the anthem and maybe they’ll stick around, and even if they don’t stick around they’ll see a couple dozen commercials before the anthem finally shows up.