The very word "counter" comes from the concept of "counter-rotation", or in some circles "counter-action". Whomever started the ridiculous idea of "skiing into" counter-rotation was full of hogwash. You can't ski your skis into counter. its not even biomechanically possible. Its an interesting mental model that sometimes gets people to do the right things, but activation of counter-acting muscles above the legs are required in order to create "counter" relative to the direction of travel. Countless times I have watched peers with poor upper/lower seperation and I give them some tips about using counter-acting muscles above the legs, and watch them transform into a skier with great upper/lower seperation. The skiers that THINK they are just skiing into it with their legs are actually using the same muscles, they are just remaining ignorant of that fact. They are letting their body do it instinctually, but some skiers don't gravitate to those activations instinctually, they might take the ski into counter advice very literally. They are actually following that advice even better, but its lousy advice.
They need to be told to activate the counter acting muscles above the legs. If you need to do it, why not talk about it? Its hogwash not to, or to continue the lie that counter comes from the legs skiing into a magically stable upper half. That is fiction! hogwash!