The anxiety you mention seems to be pervasive to the forum as a whole. A lot of debates/squabbles are about who or what is up-coming, in or on the way out, what or who is great, good, indifferent or bad. There’s a sense of hierarchy with ‘art’ and established ‘artists’ at the top of the heap, and the forum sometimes seeming like a place where a lot of jostling takes place for upward bound space on ladders leading to perceived pole positions. Aspiration for validation. Or recognition.
I’m a bit confused by your line of questioning. Painting, sculpture, performance, film, video, photography... fashion. Are you suggesting that art is something quite separate to any other discipline under discussion? Is art passé, irrelevant, or still covetable and nebulous and outré enough to warrant continuous debate? You state that art is a thorny term – what do you mean by it?