I was just checking out Joe McDonald's blog (on hiatus for the time being) and there was a discussion about the concept "Yes, or roll the dice".
I'll let you read it for yourself to get the full scoop, but I wanted to put this out there: "Yes, or" is an assertion that the resolution mechanics should only be engaged when a) something significant happens b) that creates a conflict of interest between a player and one or more parties. You have to have A and B; we know from Conflict (not Task) Resolution that inanimate objects and such can, in this context, have "interests" that they defend.
Let's expand on that, though, as it's not really the mountain you want to climb that has a stake in this: it's the rest of the game group. You're rolling against the mountain, sure, not another PC or a GM character, but it's important to the group that Credibility be established and enforced here. This has always been the case; it's nothing new. But it's gone unsaid, and should be clearly stated. CR's little "rocks have feelings" clause is there to acknowledge that, if we frame conflict as a conflict of interests, then the interests are really between the acting player(s) and everyone else at the table, using the mountain as a pawn, a stand-in.