Unlike most NBA fans I like it when NBA players participate in important FIBA events. Yes, injuries are a worry, but players get injured all the time, they could get injured practicing. Tiredness is an understandable concern, however, I have no sympathy for the NBA teams in this regard because of the ridiculous 82-game regular season, back-to-backs and stuff like that. Meaningless from a basketball point of view, money generating though.
7-10 intense games during the summer can make a lot of good for all players, much more than 7-10 early december NBA games anyway. Durant, for example, will return a better player and a better leader because of his participation in the World Cup, so will Scola, so will others. Just like winning the olympic gold has undoubtedly helped Manu grow as a player and in reflection helped the Spurs as well.