First off, unless you've been banned no one has been driven away. If someone chooses not to post, that is their decision. No one makes them go. Individuals makes decisions and act them do to reasons that are entirely their own.
I think you're deluding yourself if you think the community has no role in this. It can be gracious and grateful for the pro bono assistance of its better-educated and more experienced members, or it can be obnoxious and make their lives less pleasant. Would you keep answering questions about First Aid or running sleds if I, knowing very little about either topic, argued with you every time you did it?
Secondly, and this is at the crux of the matter, I don't believe there was a technique argument: no one was offering MA (And I'd never give any as I acknowledge I'm not really savvy about that sort of thing) and I don't think I've ever countered any of the 'experts' listed by Dan B. on that sort of ski analysis (it's their bag after all).
There are technique discussions that don't involve MA. If somebody asks a "How should I.." question, they're asking about technique/tactics/etc, which falls into categories best-answered by people who know what they're talking about, and gingerly treated by those who don't. It's important to note that this is always relative. In some unfortunate crews, I'm the most knowledgeable. In other, luckier ones, far from it. How and whether I answer such a question or defer to others depends on the company.
Obviously, when someone starts a thread they are soliciting a widely broadcasted response. If someone only wants the ideas of any one person, send them a PM. Seems easy enough, right?
Maybe they're interested in the ideas of multiple experienced people.
Now, thought on 'unassailable' expert hood. I don't believe that Daron Ralves or JP Auclair are regular contributors here. Those guys are experts...but you know what? if they chose to participate on an Internet forum, I'd engage them directly, too, because dialectic is the real joy and benefit of an open global forum and uniform, one way pontificating is the ultimate dead end.
Dude, I like you, but have you completely lost the plot? First, it shouldn't require somebody with the credentials of a Daron Rahlves or JP Auclair for you to respectfully listen. There are plenty of guys way worse than they are and way better than you who deserve respect for their skills. Dialectic might be the real joy for you, but plenty of others get pissed off by it when it's initiated by a relatively uneducated source, and are only willing to put up with it for so long. They don't have the time, interest, or energy to engage in dialectic with every unqualified forum poster on the internet. By continuing to harangue them, you encourage them to stop contributing their time and expertise, and all of us lose. Would you please think it over from their perspective?