Here's the thing Geepers. A couple of bumpers online express how they like zipper line skiing, and you compare them to the mafia. Meanwhile, the organizations you're plugged into, man, demand that you use your edges, just so, to look like JB, otherwise you won't receive the coveted L3 status. Once you get this respected status you can come online and tell people that you don't approve when they skid, and people should listen to you, because you're an L3 (not all L3s do this, but several do). Meanwhile you can't see the arbitrary difference between demanding that you zipper line vs. demanding that you use your edges a certain way. Instructors could just as easily have gone another way, like several other organizations that dictate where you must turn to be the best (alpine racing, comp mogul skiing). Merely, some people decided that a different standard of excellence was more appropriate for recreational instruction. So, you just accept that to be the best you must dedicate 1000s of hours of your life chasing an arbitrary standard, while simultaneously resenting others that aspire towards skiing that doesn't resemble the ideal you've adopted. Add on those that are also critical of skiing styles working towards a different standard, and you have a hypocrite.
So, this is why we have endless thread wars over zipper line skiing. Footsoldiers like yourself come out advancing all the myths about zipper line skiing that attempt to render an objective reason why it shouldn't be the standard of excellence (bad for the knees, only for daredevils, can't be done on natural bumps, no one is interested.....) The propagation of those myths are rooted in the desire to feel like a great mogul skier without being able to zipper line. People that know those myths to be false come out disputing it, and all they're trying to say is that zipper line skiing is great and something worth doing. But, all you hear is that you're not a great skier if you don't zipper line.