Ummm.. Roy had degenerative knees, which Bynum also had. Guess what? Both of them aren't in the NBA.
Rose may have a few major injuries, but a torn meniscus isn't going to force him to retire. Rose needs to realize now he has to change his game, and become a better shooter/defender/passer.
The type of circus layups, and twisting/turning into the lane days are over. Personally? Rose needs to stop thinking about what others think, because Rose seems like a humble and likable guy. I just hope he fixes areas that need work, and stop playing that fast up-tempo style he used in his younger days. Plus he isn't even in his prime, so why would he retire?