Couple of points you say "no other country" but Russia and China are definitely engaged in both.
Quite frankly it's probably only a matter of time until India develops them as well. The fact of the matter is all our history, doctrine, tactics, and studying come from living in a bi-polar world.
We aren't living in the 1940's or the Cold War, we are living in the early 1900's and we need to start studying that time to understand how to navigate and succeed in a multi-polar world (Russia, China, US, India?), or we will be fighting a trench war, while the enemy comes in with tanks and machine guns.
Quite frankly it's probably only a matter of time until India develops them as well. The fact of the matter is all our history, doctrine, tactics, and studying come from living in a bi-polar world.
We aren't living in the 1940's or the Cold War, we are living in the early 1900's and we need to start studying that time to understand how to navigate and succeed in a multi-polar world (Russia, China, US, India?), or we will be fighting a trench war, while the enemy comes in with tanks and machine guns.