In 1970, the average income was $6,100 for 12 months of work. The average NFL salary was $23,000 for 4 months of work. 1970 was 47 years ago. Someone making more than 3 times more than someone else in 1/3 the time is not roughly the same, and it didn't feel roughly the same either for the average person making $6,000 a year. Since then, the gap has spread to an enormous difference.
Same as the NBA and major league baseball.
For some reason, I think reality is about to hit on this whole pyramid scheme. Why would you pay $75 to watch a marginal pro-team play another somewhat marginal team play? It doesn’t make any economic sense.