As seems to often be the case in military escapades in various parts of the world, the undisciplined yahoos from either side just get their enjoyment from blowing things up, regardless of any military strategy. It's like an extension of raping all the women, which serves no strategic advantage either.

I will add to that, and then after they have destroyed parts of the Countries infrastructure, they will expect aid from the west to feed those suffering from famine and to rebuild their palaces, headquarters, barracks, Hospitals, rail system, national airline, VIP aviation and all the military assets that they have destroyed.

yes but think of all the student on gap years, arms salesmen and bankers that will be employed!

Also all the cranes for miles and miles around:
Berlin in the years after the wall came down was a vast building site and the "crane per square kilometer" count must have been worthy of the Guiness Book of Records. Yellow or orange, most of them.