there is a lot in there that can be used as a block, or at least a re-directing parry of some sort....there is often an exaggerated reverse swing in the punch that can also be used as a deflection or parry or block, depending on how you chose to define it.
...But we definitely do have defensive techiques for intercepting an attack that is coming in before we go into berserker mode and wreck the room.
What your post made me think of, FC—especially the bolded part in this excerpt—is the role of chambering motions in TKD and other karate-based arts and how of they're misinterpreted because of the packaging involved, seen as something useless or over-stylized—when in fact, it's these moves which are the literal blocks/deflections/interceptions/parries, and the `block' movements actually correspond to strikes on weak points like the throat,, collarbone, and groin. So you see somebody swing both arms back with the hands open, and then sweep forward into a `middle knifehand block'. But this is typically code for the deflection of a hard swinging punch to the outside, with the innermost elbow following round to smash the attacker's face; the out back-swinging knife edge, after completing its pain-inflicting redirection of the punch, works in a species of hikite to trap the attackers' damaged striking arm while the defender's hips and upper body pivot round, getting in very close to the attacker's head; the trapping hand anchors the attacker's arm, whilst the `knifehand block' which concludes the techniques is blocking nothing, but is instead targetting the attacker's throat or carotid sinus. I've recently started doing triple 1" board breaks, no dividers, for the first time since I broke my hand doing that with a punch two years ago; these days I only knifehand breaks, and I know that if I can break three one-inch boards in a stack, that a really experienced fighter is going to be able to do some major damage applying that same strike to someone's exposed neck or larynx. This is as I say a standard kind of defensive attack sequence in the karate-based arts, but the important point is that all the deflection takes place in that `exaggerated reverse swing'—exactly the right phrasing—which proceeds what advertises itself as the blocking movement, but which is actually the terminating strike of the combat sequence.
Similarly, a standard bunkai for the elaborate back swing of the so-called down block is presentation of a horizontal or spearing elbow strike (in connection with the hikite of the retracting fist trapping the attacker) to the forward-moving assailant, who will slam into it and then meet the incoming `down block' motion, aka a hammer-fist strike to the head, neck or groin.
So yes, I think I can see that, like any TMA that's been around for a while, TWC combines deflecting and attacking moves, using a certain amount of concealment. Makes most excellent sense!