Reality has no ubiquitous reason to make sense. If it does at any point, we can as well ask why it appears to make sense in that moment. My personal hypothesis is that we are what makes sense of the world and physics as we observe it is our collective psychic intent trying to force nature into a perpetual state of self-consistency. Since we make it happen, or else give it the structure that makes it happen with increasing consistency, we have creative control over what types of weapons will become possible with future "discoveries" in physics. The only rules are the ones we impose, so the only real hard constraint we have here is self-consistency. What do you expect to become possible at some future state of technological scientific discovery?