That's because the image that we have is of Alfred in the street beside Batman with a gun in each hand, firing away. That's what we've been told, so that's what we're basing the discussion on.
But making a lot of wild assumptions based on a single preliminary promotional image
-- assuming that it tells you everything you need to know about how the character will be handled -- is presumptuous. After all, preliminary designs can change during production, and promotional images can be deliberately exaggerated and misleading. So it should be obvious that the information we have is not only fragmentary, but unreliable. So the sensible thing to do is to say, "Okay, we don't know enough to judge" and leave it at that. Or to use our imaginations and consider the multiple
possibilities that could be compatible with what little we know, rather than jumping to a single conclusion and basing one's whole reaction on it alone.