No, the average age of the NFL fan is well into upper middle age. This is why all the tired old bands are getting recycled, nothing more.
The good news is that there is a younger generation of NFL fans, so the sport will survive. They just like different music. You’ll know those fans are the primary demographic when their bands appear at the halftime shows.
The NFL tried appealing to that younger demographic with halftime performers like 50 Cent and Janet Jackson... and they went back to the older bands because the transition didn’t go over well.