Earlier quoted context omitted.
> Someone has got to air the games. Does someone? Sure, professional football has been very popular for many decades, but there's nothing about the order of the universe which states that it will remain so forever. We don't have chariot races, or gladiators, or bear-baiting — maybe someday we won't have professional football either.
The NFL's life expectancy is now less than 20 years. Young people aren't playing the game, because their parents don't want their brains to get all smashed up. Active participation in tackle football among teenagers fell from 9% to 7% in just 5 years from 2011-2016. The talent pool will dry up. The game will be less interesting. The fan base will die off.
Its more about the availability of gladiators than the sports history of people in the stands.