I'm A Banana
Potassium-Rich
But whether it should be achieved through simulationist-oriented mechanics (as eg in Rolemaster) or through some other mechanical approach is an open question.
Right. But you see in the BW example, it was up to the DM when to call for a check, and the DM did it when the drama and tension was required.
In the mearls rough draft, the PLAYER gets to decide how they're going to climb, and so even if the DM had some dramatic cliff face suspense scene versus some giant spider or something in mind, the player gets to decide that the situation is not dramatic, since he can't fail. In fact, with that little rule, the player decides that no climbing situation is actually dramatic -- he never risks failure by climbing.
It's just a rough draft, so I'm not exactly calling it out or anything...kind of a minor point, in the grand scheme of this being a pretty interesting skill system at its core.