Do you think a real coach thinks it is fun when his starter goes down? He just deals with the cards that he's given. I don't know any coach who thinks it is "fun". Maybe that's a bad word to use, I dunno?
I think your language betrays what it is you want to convey. Injuries and making decisions based on them are not fun. They just happen to create a state of affairs where certain decisions that would not ordinarily be made are now required to be made.