If the team gets worse, he might not have people to put in the seats. nah $10-15 baseball tickets, beer, and hot dogs. Chicagooans will flock to that no matter what.
I've wondered about that but I've seen that at many other stadiums and arenas where fans are allowed. Assuming its to keep us mouth breathing fans away from the players. Particularly important with our dumbass team who won't get vaccinated The players are almost always a good 10-20 feet away from the bleacher fans (Pre-Covid). the lower deck grandstand fans get in much closer proximity to the dugouts/players than the 3 outfielders do to the bleachers.