Player Valuation: £6m
If you rephrase what @davek was saying a little bit, it doesn't look nearly as sinister.
Suppose that James wanted to play for Carlo in part because he knows Carlo isn't going to chance him when partially fit. They both know from experience that doing that is likely to lead to more serious injuries, and therefore James and the club are both made better off if James sits or goes to the bench to be subbed on late when he has a knock.
Not all managers would be that understanding. They let short-term self-interest get in the way, or think that this particular player can/should be managed differently.