I think this discussion needs a little reset. I do get it that just trying it out and learning from your own mistakes, face-plants, yard-sales etc., will eventually get you there. I have done plenty of that and I am already dropping some rocks (ugly show it might be though). But that is not what I am talking about. I have been teaching medical students and residents for a couple decades and came to realize that some critical clinical skills and procedures (like intubating tracheas, placing big intravenous central catheters etc) in order to be performed SAFELY on actual patients need to be practiced at least partially on something else. Notice, that this is not the prevailing current practice. Traditionally you let your residents to learn and practice their first procedures on real patients, and if they make a wrong move and patients suffer a complication, oh well, it is a teaching hospital after all... Not a great approach on close examination, considering that alternatives can be found. Of course I could let them have themselves punched in the face and just go for it (no beer though) and experience couple of those bone shuttering landings and embarrassing yard sales, so to speak. That is exactly how I learned more than 20 years ago, before I became pretty good with what I do in life. But personally I find it unacceptable and now I teach my trainees in a simulated environment before they move to practice on real patients, which is safe for their future patients and themselves, litigation wise. The approach I use, is breaking every critical skill in a few basic element which could be addressed separately and practiced to the point of proficiency. When proficiency is achieved those elements can be merged into one whole in a dynamic way. This is exactly what I an looking for when it comes to skiing. A good example of it is Chuck Martin series of youtube segments on bump skiing (the best in my opinion) or Harald Harbs stuff on the web (don't attack me for that, because I think he is great, I don't care what anyone says). Their stuff does not always directly translate in actual dryland exercises but it definitely demonstrates essential elements of successful technique. From there it is only a little step to design appropriate imitations, akin to medical simulation.
To give another analogy, let say Tyrone Shoelaces (sorry for using you as an example, but you seem to be great with dropping awesome stuff) becomes a grandfather. Let say, for the sake of this analogy, his own daughter happened to have very little esteem for all this dangerous stuff her own father has been doing all his life, and, naturally is very reluctant to let her precious son to go out and ski with his doting grandpa. And she gave a very firm and clear warning that god forbid if anything happens during this skiing outings... Anyways, the kid ( 8 yo) is getting actually quite good at skiing and begging his grandpa to teach him how to jump cliffs. What are the essential elements of proper SAFE technique Tyrone would have to tell about, over and over again to his beloved grandson, and how would he prepare him for that. Besides shotgunning beer and teaching how to effectively punch yourself in the face, which has been ruled out by his daughter for some vague reasons.