a. this is not the Olympics, he's not going to be practicing against top level players, they will be NHL players, but they're not franchise players, and most aren't even 1st liners. So the "experience" won't be all that valuable.
b. International experience is gained at the U-18's, U-20's, and spenglers and also the WC. But if you're going, you should actually be good enough to play. Take Tavares for Canada, could have taken this year, but didn't because he wasn't ready, when he's good enough, he can go. The outcome? Canada won, and if Tavares is good enough next year, he'll go when he's ready for the experience.
c. if you don't plan on winning this tournament, what year do you plan on winning it? The next year are you just gonna take more people for experience, are you just gonna test people the next? What about the 2010 Olympics, should you just prep players who might be good in 2014? Of course not, you play every tournament to win.