est.1999, are you a football fan by any chance? If so, try this one out: The Eagles last year had 2 QB's: Donovan McNabb and Michael Vick. McNabb has a great arm and is a deadly thrower, but his mobility in the pocket had decreased due to old age and he can't run the ball effectively anymore. Vick, on the other hand, is young and speedy, and can run a wildcat style offense that doesn't rely on the pass as much as the run.
The Eagles play the niners, a team that is designed to stop the run, but has really a shoddy secondary and can't stop an effective thrower. If McNabb is hurt for this game and doesn't play, the niners have a good chance of stopping them, because they can stop the run. It's what their defense is designed to do.
Now if the Eagles were playing the Buffalo Bills (who were 2nd in the NFL in Pass defense, 30th in rush defense), the Bills would obviously want McNabb in the line-up. He's a great passer, but Buffalo's secondary is great too, so he has to beat them, and cannot hurt their crappy defensive line because he can't run the ball. If McNabb is hurt, and Vick is out there exposing all of their defensive flaws, it changes the structure of the game completely.
Nobody is arguing that Bogut isn't a key piece in Milwaukee's game plan. But a team's style of play is dependant on the 5 guys that are on the court at a given time. With Bogut not on the court, they play differently, and this gives Atlanta fits. That is all.