Shaped skis made it possible to get more carving effectiveness for everyone. Easier to arc yes. Also easier to get closer to arcing and create rounder turn shapes because of it. Ie...to carve better. Carving is not an on or off switch.
Rick is totally wrong when he says that everyone back in the day only referred to pure arcing as carving and everything else as skidding. Maybe in his arcing elistist club. People have been talking about carving and movements related to carving, without neccessarily arcing for a very long time. Its actually only in recent years that it became relatively easy for more people to arc their turns more often. Thus the arcing elitism started to grow as those elitists attempted to steal the word carve and refer to pure arcs and then disgard anything less than arcing as lumped into the "skidding" category. However this has thrown out the baby with the bathwater in terms of identifying what it means to carve and the input movements needed to produce it. Carving has more depth to it then on or off. But again why all this strive and conflict and mis information over language used?
Helluva started to get to the bottom line of this, but didn't really come forward with specifics, but a lot of it does come down to INPUTS. Use the right inputs and you will achieve high levels of carving effectiveness. its particularly easier on today's technology. You might even start arcing rather readily, though arcing is not always the best tactic, more often then not. But getting very closer to arcing, with high levels of carving effectiveness, that is extremely useful.
Here is a diagram I shared a while back...
The blue area to the right, inside the carving circle is where you want to be for max control in most recreational and all mountain scenarios. well if you're trying to ski like a "bat out of hell", then in the arcing area to the far right is actually where you want to be. But in terms of the OP's original question and what was discussed with his clinician about top of the turn control, turn shaping, etc.. That happens in the blue half moon area on the right side of this diagram.
Listen, language aside, you don't like the word carve there, then come up with a better one. But don't leave an empty void while you teach people to ski more towards the left side of this digram with twisty movements that lead to ineffective carving and excessive skidding.
Carving is not an off or off switch, its a spectrum. There are different Points of View about what terminology should be used there. There really isn't any officially recognized terminology if you think about it, so those are silly and deceptive arguments. As Helluva started to say, but didn't get into the details, it really comes down to INPUTS. The actual movements. I agree with him to a point, but I think also we can look at the ski performance and we can easily see whether high levels of carving effectiveness are happening or not. I've laid out those parameters earlier in the thread.
By the way, the USSA manual in question is around 10 years old. Its the Fundamentals manual, I think used for level 100 cert, not sure I haven't tried ussa cert yet, I just got the manual a while back with that intention but never got around to it.