I don’t agree with this at all regarding popularity of the two teams in the 70s. I grew up in the SW suburbs and I don’t recall things being overly skewed toward the WS.
From 1970 thru 1980, the Cubs outdrew the WS in attendance every year except 1974 and 1977. And a few years it was by a considerable amount. And this was when the Cubs didn’t benefit from night baseball limiting who could attend games, especially in April - May and September. Also, the Cubs had the benefit of being on a much more regularly watched/popular television station in WGN. Harry went to the in 1975 (I think) but Jack already a Chicago icon.
That all said, F the White Sox. I’m a hater because that’s how I was raised (although they’ve been almost exclusively irrelevant in my adult life).