Still the USA have high faith in having a carrier fleet,
America has faith in anything it can strap a gun to - the bigger the better!
America has a fleet of carriers so it can project it’s power around the world by parking them off the coast and, thus, have a level of armaments bigger than most countries,sitting in the ocean, anywhere in the world.
I think we’ve got to dismiss the idea that any sort of conventional weaponry is of much use in the event of a clash between the super powers. Hopefully, they realise that any kind of war would be futile. But in the case of smaller countries (we may as well take Iran or N Korea as an example), a large fleet of carriers with attendant vessels a few miles off your coast is definitely enough to make you think twice.