Because if they're sucking for a while, and word gets out they've been sick and/or injured, there's a good chance the two are related. And yet the Cubs rarely seem to put position players on IL. The Cubs will use IL for their pitchers when they have to, but it seems like they are bizarrely averse to using for position players unless they flat out can't play. I seriously doubt they're magically luckier than almost every other team out there when it comes to player health. Bryant, Zobrist, Russell and Contreras are all key examples of players in recent seasons who clearly needed to heal up, and they just kept trotting them out there well past the point it was obvious something was wrong, like they were going to get better if they played hard enough. They actually did it with Rizzo also, let him play through a back injury that saw him hitting like a pitcher. Plus, you just dont horsefeathers around with knee injuries, IMO. They also had Descalso play for 2 months after spraining his ankle. Even if he didn't play every single day he still had to go to the park, take BP and FP, etc.