I would not wish to speak ill of Harry Carey, the Cubs announcer but I believe he really was a big beer drinker and it keeps on going. I don't know if I would call Cubs fans as being like tourists, but maybe the Cubs just don't really know how to win not that they can not win. It seems to me, the Cubs and their fans have been (somewhat) complacent with their teams lowly finishes.
The atmosphere at Wrigley pre-dates Harry Carey. Harry could definitely sell beer, but he did the same act at St. Louis for years, and the White Sox as well, and those fans take their ball club's fortunes a lot more seriously than Cubs fans, as far as I observe.