In a previous administration they apparently concluded that while the government can't violate your first amendment free speech rights, they can ask a third party to do so. So what makes you think that the CIA won't hire blackwater or the crips to hit your toes with a ball peen hammer until you tell them what you want to know, and then walk away having not violated your constitutional right to privacy and not incriminate yourself?
I don’t want to get into specifics because ultimately it just comes down to the logical argument that just because a strategy is not by itself successful against all possible threats it doesn’t mean it’s worthless. By this logic you wouldn’t lock your front doors.