There is that chance, particularly if our worlds at home continue in our absence, that they could do so without our being there. But this Blight, even if it represents my death, feels like something I owe to those who came before to be present for.
The Darkspawn are tainted, dark, shadows of the creatures they once were. Men exposed to their blood inevitably succumb to that same vein of madness. Grey Wardens carry that same taint, on a longer time scale. I have survived 23 years with since my own Joining. At the start of a Blight, no less. I think to die in battle would be the best I could hope for. For I have seen the alternative, and it is a horror I would wish on none.