Maybe it's too dangerous. Still in all, it makes one wonder why?
Even shows that are "live" are usually "live to tape". This is to allow editing -- for commercials and other video inserts.
Thus, for purposes of timing and camerawork, virtually everything is rehearsed. That way, everybody involved -- on-camera talent, directors and cameramen -- can all know who will do what next.
Working on the skinniest of budgets, it still takes about three hours to tape a thirty minute show, live-to-tape.
I suppose they must appear polished above all else, eh? It wouldn't do for our Ministry of Truth to appear to be anything but perfect. They have an image to maintain?
FGS