Expendable? Though they bring us back to life; if we were that expendable, they would not bother and instead just bring in more travelers. [ Kaworu has died three times, twice in Asgard. they bothered enough to resurrect him all these three times, even if Kaworu doesn't even think he is important at all ]

They brought us here because they need us. And even Thiazi finds us important. [ important enough to try to mess with the travelers directly. So, to say Odin doesn't give travelers much importance is a bit suspicious. Perhaps he does, he simply doesn't wish to show it.

Still, the angel does not say anything that is simply an assumption. ]