I feel there must be an enormous amount of really talented songwriters out there who can't sing.
What opera isn't violent? Two things happen, violence and love. And other than that, name something else. You can't.
Let's say a Soviet exchange student back in the '70s would go back and tell the KGB about people and places and things that he'd seen and done and been involved with. This is not really espionage; there's no betrayal of trust.