Improving offence helps you improve defence. If you make the most dangerous weapons in the world, then you solely have the ability to figure out the best ways to defend against them.
The US will have a significant advantage in developing jamming systems against these types of rounds.
The US isn't afraid of some Afghan insurgent living in a cave from developing a countermeasure against these new munitions. They're afraid Russia or China will be capable of developing a countermeasure. The rounds are worthless, or potentially dangerous, if you can cause premature detonation.
The US will have a significant advantage in developing jamming systems against these types of rounds.
The US isn't afraid of some Afghan insurgent living in a cave from developing a countermeasure against these new munitions. They're afraid Russia or China will be capable of developing a countermeasure. The rounds are worthless, or potentially dangerous, if you can cause premature detonation.