MLB WS viewers (ratings) and # of HRs/game for the season:
1980: 42.3MM (32.8%). 1.46
1990: 30.2MM (20.8%). 1.58
2000: 18.1MM (12.4%). 2.34
2010: 14.2MM (8.4%). 1.90
2020: 9.6MM (5.6%). 2.56
During this timeframe, the population of the US has gone from 227MM to 333MM (47% increase).
The 6 highest home run rates in MLB history happened in years 2019, 2020, 2017, 2000, 2016, and 2018.
If chicks ever dug the long ball, they sure got over it very quickly.
Peter,
You could do this same comparison for several other things that are far more likely to be causes of declining viewership than an increase in home runs.
One is the length of games. Another is the number of pitching changes, which has become mind-numbing. But the big one, IMO, is the starting and finishing times for the games. There had never been a World Series night game until 1971; the last World Series day game was played in 1984. The first pitch is between 8 and 8:30 Eastern time, so the games don't end until much too late for kids to watch.
We have a couple of generations now who have NEVER seen the completion of a World Series game, and if you know you aren't going to watch the end, you are much less likely to watch the beginning, I think. It's no surprise that viewership of the WS is way down; there aren't any bigger baseball fans than I, and I don't watch WS games til the end.
It is a tribute to the GAME of baseball that it continues to survive the BUSINESS of baseball; the MLB owners are just the worst. They are cutting the minor leagues to save $60 million a year TOTAL; MLB player payrolls are now nearly TWO BILLION per year! Will the loss of minor league teams increase or decrease interest in the major leagues in the long run? That seems an easy answer, doesn't it?