They can pop out defects and if things go wrong and there's friendly fire or civilian loss, it's chalked up to scrappy efforts in war. The USA does not get the same amount of leeway, saving our people is a top priority and the media harps on any mistake.
And it makes sense. If the choice is between getting killed by the enemy and loosing the war or risking that one in 10 000 launches results in friendly fire it might be worth it but it would not be for a country not fighting a war for survival.
