The largest NFL stadium seats about 85,000 people. So you can't sell more than that for the single game. Two years ago they actually set the record lowest attendance due to Covid restrictions - only about 21k were allowed in the building. I believe it's the first SB to ever sell below capacity, and you'd have to go back to the second world war to find an NFL championship that did the same.

Also, music is fundamentally better live. Football is not. I say this as an avid fan of both who attends both live.

There's a difference between "the odds are against you" and "nope, sorry". Even if those odds are extreme.