Otherwise, I have no idea what you are talking about. TSA Precheck still requires you to go through TSA security checkpoints, and you still gotta get all your items scanned and walk through the security gate (you just don't need to pull your laptop out of the bag and don't need to take off your shoes). And you still might get occasionally pulled to the side for an extra check because you got randomly picked (happened to me twice in the past few years).