How does this defend the country against cyber attacks? Surely it just makes it easier. Have I misunderstood you?
Also, on a side note, I really dislike how the word cyber is now ingrained in our vocabulary.
Here's one article that mentions E2E encryption: https://foreignpolicy.com/2015/04/23/defense-department-sili...
There are a lot more advantages that could be taken if necessary, the actual problem is that the US is too powerful and the world needs more balance.
Whether or not this is the actual problem, this isn't what the US government thinks and we are analyzing the US governments behavior by examining what she thinks.