Because interrogations are intended to coerce confessions, interrogators feel themselves justified in using their coercive means. Consistency regarding the technique is not important; inducing anxiety and fear is the point.
“Setting a good example for your children takes all the fun out of middle age.”
“And poets, in my view, and I think the view of most people, do speak God's language - it's better, it's finer, it's language on a higher plane than ordinary people speak in their daily lives.”