Sure Primitive tribals can destroy themselves and their area with weapons. What's the big deal about that. Even Biduins knew how to pitch tents, but the same bidus could not have built the pyramids.
destruction is easy and can be brought on by the tribals. Remember the peanut-sized brains of dinosaurs. They were pretty darn sophisticated, but not as sophisticated as mammals.
On the other hand Construction comes from higher civilization.
My question remained unanswered !!!