From a tactical standpoint, we're burning wounds every round we're sitting here, a bit of overkill might be just the thing to get us moving again. Otherwise I agree, fire discipline is a great thing to have.
Theological question: is it still heresy if we're dead? I mean, our immortal souls would have already been claimed by that point (I think; the fluff on souls has been inconsistent, at best) and the mission failure technically doesn't occur until
after, so....