I seriously have this problem. I've almost played 5 seasons and during those 5 years I've had 5 injuries that lasted longer than a few plays. Hell, a team that has only 5 injured players (1 week to a season in length) for one season can consider itself lucky in the NFL.
I personally want injuries cause they're part of the game. Most injuries are for the game or for the next week. I want to see this in the game.
Good injury frequency makes a game more realistic and thus more fun. NBA Live has a slider for this, I wonder why Madden has not