Well, to be fair, you could drown in any vehicle that went into the water- M113, Hummer, 5 ton truck, Bradley...
You are correct. Nobody lost their lives to the IED but one did lose a foot and we lost a $4 milion Stryker. Is that a win?
The thing is, we're not God. We can't see what might have happened to the same soldier who lost his foot had he been in a different vehicle. If he had been in a different vehicle and lost his life- not just his foot- then I say, yes, the fact that he was in a Stryker and only lost a foot as opposed to his life is a victory.
Also, they're not kids. I wasn't a kid when I served and I'm quite sure these men in Iraq wouldn't like being thought of as kids either. They're men. Grown up men.