That is an argument whose logical conclusion is that NSA can't do any SIGINT using vulnerabilities My argument shows that in some specific instances, we are le

That is an argument whose logical conclusion is that NSA can't do any SIGINT using vulnerabilities My argument shows that in some specific instances, we are less secure. There's probably still a "net global" argument to be made saying that although there do exist costs, they're outweighed by the overall benefits. The problem with that, in turn, is that we're not allowed to know either of the arguments into the equation. They argue that the costs are zero (which is clearly false), and they won't tell us what the benefits are (other than the unsupported claim that they're immense).