Not only that, but they‘re also literal bombs. Remember E=mc^2? With a technology capable of converting 100% of matter into usable energy, you‘d have a pretty scary bomb bomb.

I think I’ve explained this too many times to do it again, but: teleportation doesn’t have to be “destroy and reconstitute” any more than going through a door necessitates killing you and reconstituting you on the other side of the door. The key is establishing continuity of your mind across the intervening space, which is mostly an engineering problem.