On this site we pursue the nth degree of arcane detail when it comes to ski reviews, boot fitting, technique analysis, and any number of other topics. That level of detail outstrips my wine posts by orders of magnitude. We explore these skiing-related ideas in a broader context of international discourse about skiing, which has its own vocabulary, values, assumptions, history, rock stars, journalists, long-standing organizations, publications, etc.
Pursing this degree of detail is snobism only when we give gratuitous feedback to someone who is content to cruise blue goomers on old equipment, using crappy technique, to the effect that she needs to shape up or ship out. (Feedback that is explicitly requested is another matter.) I like to think we don't do that too often, and that someone will call us on it if we do.
If your point is that (what you see as) arcane detail about wine that might be fine on a dedicated wine site doesn't belong on a ski-centric forum, I can imagine why you might say that. I don't agree because one of the things I love about PugSki is that many topics besides skiing are discussed by people who have interesting and meaningful levels of experience with them.
By analogy, our undemanding blue groomer skier is more than welcome here because of his/her enthusiasm for skiing - the thing we all have in common. However, I'm not going to be bothering to read her posts about gear or technique if she has already declared herself a happy philistine on those matters, let alone take seriously her criticism of my reflections.