I think if you asked the leaders of Chad and Sudan what they think of arbitrary lines drawn in the desert they would tell you that regardless of how much meaning they try to invest them with, at their core they are artificial distinctions which cause endless trouble! lol.But of course people do that all the time. They're called "borders". And that's the gig, something can seem meaningless to one person while being quite important to another, and while all of it is a rationalization on some level, that doesn't mean it doesn't seem coherent internally.
Why is there a difference between a meta-currency and a random check? That seems like another arbitrary distinction. Well, @pemerton actually has pointed out a distinction, in that a die roll in response to a character saying "I hope I have a bit of rope" IS different from a player saying "I spend an equipment slot to pull a rope out of my pack." Yet at the same time the later hardly seems to be some monumental violation of actor stance. The action and motivation of the character was still in keeping with the player, an 'equipment point' (this is how DW does it) is just mere book-keeping, no different from Hit Points, which seem to be at least seen as a necessary evil. So either way, the distinction IMHO seems pretty arbitrary.Well, that tends to turn on other issues, specifically how fine you want to sift resource management and the like. In a game where the convention isn't to be to tight about that, I doubt an immersive would blink at that--but they also wouldn't expect to need to spend anything special to do it. It'd either be an agreement that it appears reasonable between the player or the GM, or a random die roll of some sort.
Right, so then what would your argument be against a Wises check, BW style? There's no currency there at all! In fact I think the only constraints on the use of something like that are basically situational/fictional (IE if I'm an expert on plant life, I am not going to get much use out of a Wises check to know where emergency space suits are stored on an Imperial Battlecruiser).That's the issue of course; most metacurrencies (recalling caveats I've presented earlier) are about authorship-on-the-fly, and at least the being-character immersives don't want to be doing that during actual IC play. And a metacurrency in that situation only makes sense in that context; it requires the player to decide what that's worth to them (since its a finite resource) and they don't want to be making that decision at that part of play.