Bombs and other kinds of weapon system which are "smarter" have higher markup. It's profitable to sell smarter weapons. Dumb weapons is destroying the whole cities, like Russia did in Ukraine. Smart weapons is striking a tank, a car, an apartment, a bunker, knowing who's there and when — which obviously means less % of civilian casualties.

Remember when Obama re-defined so that "all adult males are terrorists"? That's how USA reduces civilian casualties.