We didn't do it in Desert Storm, because our commander noticed that while the Amphibs were more then capable of taking on the Republican Guard, we had a much bigger force already on the ground, and ready to go behind the Iraqis. In Iran, we can land about 800 miles from Tehran. Our carriers would destroy any air power the enemy could muster, and then our men could go in, with heavy air support.
And I looked into Anzio, and I saw something saying that some 83% of the casualties were inflicted by artillery, and air strikes. Artillery is defeated by our blitzkrieg, and their air force would die.
D-Day, we took casualties, because we had to fight against enemies in bunkers, enemies who were battle-hardened, and throughly competent. Korea, we didn't take significant casualties, distinguishable from any other military operation.
And you'll also note that in Korea and WWII, the amphib assaults worked.