In reply to john arran:
I think the distinction here is between "fun" and "adventure". Walking in to a crag on a fine morning can be a joyous experience, but if someone put down some stone slabs to get the path over the worst of the bogs on the way in then I wouldn't automatically complain that they'd compromised the adventurous spirit of the climbing there.
As to when something - a rough approach, a hard to find start, a sketchy route description, a nerve-wracking descent - becomes part of the adventure rather than just an annoyance, it seems a bit psychological and weird. My best guess is that it's about whether it feels like the same general sort of challenge as the climbing itself. So for big mountain routes or adventurous sea cliffs, having to be somewhat switched-on from the moment you leave the car can feel in character, because the climbing sits with the general ethos of self-reliance, decision making, efficient travel over difficult terrain and so on, whereas for short, hard, technical routes the climbing can feel like a different class of experience.
Post edited at 14:08