Their testimony constitutes a primary source of information from "over there".
Oh yeah? So you’re saying that whoever is “actually, physically, in Iraq” must be right? Well then if there is a single soldier in Iraq that believes that we aren’t winning, then the universe must explode or something, huh? How about you do a quick google search to find out if a single soldier believes that we aren’t winning. Or you can just dismiss their opinions because they differ from yours. So, I’ll check out actual arguments as to why we’re winning. Until I see a convincing one, I’ll hang out on my side.