They arent more effective in battle, defence or economically.
Wolf SHOULD have 2 armorys than just one to make money from producing weapons. 3 stockpiles is better than 2!
Some buildings in AIVs are enclosed and will be enclosed as walls be damaged so he likely will be rebuilding it and destroying again and again.
Pitch fields are placed little by little so he will waste a lot of money for pitching it all..